# Topic Questions: • use, when solving problems, the results that – $\mathrm{E}(aX+b)=a\mathrm{E}(X)+b$ and $\operatorname{Var}(aX+b)=a^2\operatorname{Var}(X)$ – $\mathrm{E}(aX+bY)=a\mathrm{E}(X)+b\mathrm{E}(Y)$ – $\operatorname{Var}(aX+bY)=a^2\operatorname{Var}(X)+b^2\operatorname{Var}(Y)$ for independent $X$ and $Y$ – if $X$ has a normal distribution then so does $aX+b$ – if $X$ and $Y$ have independent normal distributions then $aX+bY$ has a normal distribution – if $X$ and $Y$ have independent Poisson distributions then $X+Y$ has a Poisson distribution — 9709 P6 Linear combinations of random variables

> 90 9709 P6 Linear combinations of random variables topic questions (375 marks) on use, when solving problems, the results that – …… — 40 papers, 2020–2026.…

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CIE IAL · Mathematics · 9709 P6 · Linear combinations of random variables

90 9709 P6 Linear combinations of random variables topic questions are tagged to this syllabus point across 40 papers (2020–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved.

- 90 topic questions
- 40 papers
- 375 tagged marks
- 82.6% of topic questions
- 82.2% of topic marks
- 2020–2026
- Syllabus 2020–2027
- [All 9709 P6 Linear combinations of random variables topic questions](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/linear-combinations-of-random-variables/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**This Linear combinations of random variables syllabus point appears in 40 9709 P6 papers across 2020–2026, contributing 90 topic questions and 375 marks.** The most recent appearance is 9709/61 May/June 2026. That equals 82.6% of the 109 topic questions and 82.2% of the 456 marks tagged to Linear combinations of random variables. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history.

## Topic questions by session

Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use **Go to Practice Hub** to answer that exact question in the Interactive Practice Hub.

| Paper | Question | Type | Parts | Marks | Difficulty | Practice |
| --- | --- | --- | --- | --- | --- | --- |
| [**9709/61** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-may-june-9709-61/#q-1) | **Q1** Total Mass of Apple Bags - CIE A-Level Mathematics 2026 Jun Paper 61 Q1 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1e7d105f-a163-46dc-9773-462f7c1fe733&question_id=16109453-0ada-4177-aca0-19e5cde41cd2&source_detail=9709%2F61+May%2FJune+2026) |
| [**9709/61** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-may-june-9709-61/#q-5) | **Q5** Poisson and Binomial Approximations - CIE A-Level Mathematics 2026 Jun Paper 61 Q5 | FRQ | 1 of 3 parts ((a)(ii)) | 4 of 10 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1e7d105f-a163-46dc-9773-462f7c1fe733&question_id=197ece9d-1d9c-4bb3-9990-e257a2d6104b&source_detail=9709%2F61+May%2FJune+2026) |
| [**9709/62** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-may-june-9709-62/#q-2) | **Q2** Linear Combinations of Normal Variables - CIE A Level Mathematics | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bc359ba6-7bf8-4e8c-9790-e459dfddad73&question_id=0c0175e6-c42c-432c-b29e-ecef9d2ea7e0&source_detail=9709%2F62+May%2FJune+2026) |
| [**9709/62** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-may-june-9709-62/#q-4) | **Q4** Sum and Approximation of Poisson Variables - CIE A Level Mathematics | FRQ | 1 of 3 parts ((a)) | 3 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bc359ba6-7bf8-4e8c-9790-e459dfddad73&question_id=05c45e6e-182c-4897-960b-06a973abd8d9&source_detail=9709%2F62+May%2FJune+2026) |
| [**9709/63** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-may-june-9709-63/#q-6) | **Q6** Linear Combination of Normal Variables for Cake Mixture - CIE 9709 Jun 2026 Paper 63 Q6 | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=74ef4622-3e1e-4518-8f9b-aad534d7f8bb&question_id=406e0c51-cc42-4228-b344-b0c2849264c4&source_detail=9709%2F63+May%2FJune+2026) |
| [**9709/65** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-may-june-9709-65/#q-2) | **Q2** Coffee Volumes Linear Combination - CIE A-Level Mathematics 2026 Q2 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d2dd7616-bb35-4a90-9d38-94eabdebe7b0&question_id=50b899a6-fc43-4cb5-8faf-99f0325969b3&source_detail=9709%2F65+May%2FJune+2026) |
| [**9709/62** March 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-march-9709-62/#q-3) | **Q3** Cell Phone Sales Poisson Distribution - CIE A Level Maths | FRQ | 1 of 5 parts ((a)(i)) | 2 of 13 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1e26f7e9-2339-44ea-97d9-90bd9faf8598&question_id=aae9b917-882d-4ae8-b539-bb597ac36d9a&source_detail=9709%2F62+March+2026) |
| [**9709/62** March 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2026-march-9709-62/#q-4) | **Q4** Cheese Packets Profit Distribution - CIE A Level Maths | FRQ | 1 part | 6 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1e26f7e9-2339-44ea-97d9-90bd9faf8598&question_id=2127d194-cda5-4676-a5ff-89910de12b1d&source_detail=9709%2F62+March+2026) |
| [**9709/61** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-october-november-9709-61/#q-1) | **Q1** Poisson Distribution Probabilities and Normal Approximation - CIE Paper 6 | FRQ | 2 of 3 parts ((b), (c)) | 7 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f9836baa-d204-4e6c-ac3e-399443f78d10&question_id=3d87aed6-9a34-418a-a719-de7461b2ebdf&source_detail=9709%2F61+October%2FNovember+2025) |
| [**9709/61** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-october-november-9709-61/#q-6) | **Q6** Linear Combinations of Normal Random Variables - CIE Paper 6 | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f9836baa-d204-4e6c-ac3e-399443f78d10&question_id=c3596692-ae3e-499d-8445-570bc1773587&source_detail=9709%2F61+October%2FNovember+2025) |
| [**9709/63** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-october-november-9709-63/#q-1) | **Q1** Poisson Distribution Calculations - CIE A-Level Mathematics | FRQ | 2 of 3 parts ((b), (c)) | 7 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=18122931-fdb9-4617-9faa-70fe47bc9057&question_id=4b619677-eb02-45da-a33f-d69f0a2f857a&source_detail=9709%2F63+October%2FNovember+2025) |
| [**9709/63** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-october-november-9709-63/#q-6) | **Q6** Linear Combinations of Normal Variables - CIE A-Level Mathematics | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=18122931-fdb9-4617-9faa-70fe47bc9057&question_id=15a39caa-7916-41ac-9b68-db6e94ab509a&source_detail=9709%2F63+October%2FNovember+2025) |
| [**9709/61** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-61/#q-4) | **Q4** Video Game Cost Expectation and Variance - CIE A-Level Mathematics | FRQ | 2 parts ((a), (b)) | 6 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d42a4ed3-ade1-41f6-a4f2-55867f06b02d&question_id=f7b6e0c6-ddd7-4466-9cdd-367ce1e140e2&source_detail=9709%2F61+May%2FJune+2025) |
| [**9709/61** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-61/#q-5) | **Q5** Sum of Poisson Variables and Parameter Solving - CIE A-Level Mathematics | FRQ | 2 of 3 parts ((a)(i), (a)(ii)) | 8 of 11 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d42a4ed3-ade1-41f6-a4f2-55867f06b02d&question_id=d56f0aa5-f072-4ffa-b825-e4b3a4a1eab5&source_detail=9709%2F61+May%2FJune+2025) |
| [**9709/62** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-62/#q-1) | **Q1** Random Student Selection and Difference Distribution - CIE A-Level Statistics Q1 | FRQ | 1 of 2 parts ((b)) | 5 of 6 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=982f1712-c9ba-4c4e-9a29-35443c2d9b8a&question_id=7ad9abb7-fc1c-4831-a1ff-bbe0aeb59e3e&source_detail=9709%2F62+May%2FJune+2025) |
| [**9709/62** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-62/#q-6) | **Q6** Poisson and Normal Approximations - CIE A-Level Statistics Q6 | FRQ | 1 of 3 parts ((a)(ii)) | 3 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=982f1712-c9ba-4c4e-9a29-35443c2d9b8a&question_id=bf003bf3-e0e2-41fc-821a-80c681a1a0f5&source_detail=9709%2F62+May%2FJune+2025) |
| [**9709/63** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-63/#q-5) | **Q5** Maximum Capacity of Footbridge - CIE A-Level Mathematics Q5 | FRQ | 1 part | 4 | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8986ca9e-f4c8-452f-9d4f-779f9ae8341c&question_id=4a6b03c4-1749-4c42-81d3-06755350b6dc&source_detail=9709%2F63+May%2FJune+2025) |
| [**9709/65** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-65/#q-1) | **Q1** Sum of Independent Poisson Random Variables - CIE 9709 June 2025 Paper 65 Q1 | FRQ | 2 parts ((a), (b)) | 6 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=627bd8eb-aabe-437a-ad23-57bfdea3384a&question_id=69441e3f-3804-40c1-8487-65e71c01ff05&source_detail=9709%2F65+May%2FJune+2025) |
| [**9709/65** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-65/#q-4) | **Q4** Poisson Distribution for Cars and Trucks - CIE 9709 June 2025 Paper 65 Q4 | FRQ | 1 of 2 parts ((b)) | 5 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=627bd8eb-aabe-437a-ad23-57bfdea3384a&question_id=1f9573c3-203f-4862-af5c-54f40b95d1a3&source_detail=9709%2F65+May%2FJune+2025) |
| [**9709/65** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-may-june-9709-65/#q-5) | **Q5** Linear Combination of Normal Variables and Sample Mean - CIE 9709 June 2025 Paper 65 Q5 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=627bd8eb-aabe-437a-ad23-57bfdea3384a&question_id=d61fbd21-a8c8-4aeb-819e-0bfa6f13de87&source_detail=9709%2F65+May%2FJune+2025) |
| [**9709/62** March 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-march-9709-62/#q-1) | **Q1** Independent Normal Distributions Difference - CIE A Level Mathematics 2025 Mar Paper 62 Q1 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f515287f-f3f3-4960-8f26-88deb9234c4f&question_id=bad6b720-cd75-4fe0-bf99-4de47cd0850a&source_detail=9709%2F62+March+2025) |
| [**9709/62** March 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2025-march-9709-62/#q-3) | **Q3** Sum of Poisson Variables Approximation - CIE A Level Mathematics 2025 Mar Paper 62 Q3 | FRQ | 1 of 3 parts ((b)) | 3 of 10 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f515287f-f3f3-4960-8f26-88deb9234c4f&question_id=c1993fa2-07f2-4d02-8bfb-6f700c9d1799&source_detail=9709%2F62+March+2025) |
| [**9709/62** October/November 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-october-november-9709-62/#q-5) | **Q5** Lemon and Orange Sweets Poisson Approximations - CIE Probability & Statistics 2024 Nov Paper 62 Q5 | FRQ | 2 of 3 parts ((b), (c)) | 9 of 11 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=fc7fa85c-90ff-4c56-a30e-642dba8c9f91&question_id=e56d101d-9726-4d7c-8565-1299b0556b75&source_detail=9709%2F62+October%2FNovember+2024) |
| [**9709/63** October/November 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-october-november-9709-63/#q-2) | **Q2** Mass of Small and Large Bags of Wheat - CIE A-Level Maths Q2 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b3b968f2-d15c-4fc1-a77f-eb69648eea83&question_id=b286c0ec-2db3-42a5-80e7-8524ba1405c3&source_detail=9709%2F63+October%2FNovember+2024) |
| [**9709/63** October/November 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-october-november-9709-63/#q-6) | **Q6** Customer Arrivals Poisson Distribution - CIE A-Level Maths Q6 | FRQ | 1 of 3 parts ((b)) | 3 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b3b968f2-d15c-4fc1-a77f-eb69648eea83&question_id=8bba9270-e97c-4725-8df6-d74b7e9b4b33&source_detail=9709%2F63+October%2FNovember+2024) |
| [**9709/62** May/June 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-may-june-9709-62/#q-4) | **Q4** Linear Combination of Normal Variables - CIE P6 Q4 | FRQ | 2 parts ((a), (b)) | 6 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=559f71e6-d55f-40d6-9635-11c05b20209e&question_id=8aedfefc-6073-493f-84e9-f08c4cf72918&source_detail=9709%2F62+May%2FJune+2024) |
| [**9709/62** May/June 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-may-june-9709-62/#q-5) | **Q5** Poisson Distribution Goals Scored - CIE P6 Q5 | FRQ | 1 of 3 parts ((b)) | 3 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=559f71e6-d55f-40d6-9635-11c05b20209e&question_id=451b436c-3046-4ba8-9ef8-388b86f26b90&source_detail=9709%2F62+May%2FJune+2024) |
| [**9709/63** May/June 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-may-june-9709-63/#q-3) | **Q3** Linear Combination of Normal Cement Bag Masses - CIE A Level Mathematics Q3 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=41924067-a985-41dd-9b5b-a1e3dc5b7333&question_id=23f0663b-01b3-4e65-a0e1-f0dd718fd6d2&source_detail=9709%2F63+May%2FJune+2024) |
| [**9709/63** May/June 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-may-june-9709-63/#q-7) | **Q7** Combined Poisson Distributions and Sample Mean - CIE A Level Mathematics Q7 | FRQ | 1 of 3 parts ((a)) | 3 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=41924067-a985-41dd-9b5b-a1e3dc5b7333&question_id=df100fcd-1145-4baf-acc0-5b29299bfb7c&source_detail=9709%2F63+May%2FJune+2024) |
| [**9709/62** March 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-march-9709-62/#q-4) | **Q4** Linear Combinations of Normal Random Variables - CIE Mathematics Q4 | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2951c4cd-f503-4763-8cba-2310b86b2379&question_id=fa4edb41-a424-4ba3-8d32-5f291502c9e6&source_detail=9709%2F62+March+2024) |
| [**9709/62** March 2024 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2024-march-9709-62/#q-5) | **Q5** Late Arrivals Poisson Modeling and Hypothesis Test - CIE Mathematics Q5 | FRQ | 1 of 4 parts ((b)) | 3 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2951c4cd-f503-4763-8cba-2310b86b2379&question_id=1a116ecf-7302-4cc3-9dbf-75a9c64ca3a3&source_detail=9709%2F62+March+2024) |
| [**9709/61** October/November 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-october-november-9709-61/#q-4) | **Q4** Linear Combinations of Normal Variables - CIE A-Level Maths 2023 | FRQ | 2 parts ((a), (b)) | 8 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d0b0a284-b938-40b5-8127-f096a430986d&question_id=0e89021f-498e-4cb0-8d34-ba897508cd50&source_detail=9709%2F61+October%2FNovember+2023) |
| [**9709/62** October/November 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-october-november-9709-62/#q-6) | **Q6** Bread Production Profit Probability - CIE A-Level Mathematics | FRQ | 1 part | 7 | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=be37d972-339c-4296-b154-d6163cc7bc95&question_id=91353418-c459-4cf4-bf68-5e8555ffba60&source_detail=9709%2F62+October%2FNovember+2023) |
| [**9709/63** October/November 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-october-november-9709-63/#q-4) | **Q4** Linear Combinations of Normal Variables - CIE A-Level Maths | FRQ | 2 parts ((a), (b)) | 8 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e083de3a-a73a-40ab-8c97-5eb2697a2544&question_id=a6e4022d-8926-41f4-99b3-45510ef0d626&source_detail=9709%2F63+October%2FNovember+2023) |
| [**9709/61** May/June 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-may-june-9709-61/#q-5) | **Q5** Rice Packets Mass Combination - CIE Mathematics 2023 Jun Paper 61 Q5 | FRQ | 2 parts ((a), (b)) | 7 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=4dd6ea6e-9eda-4989-bcf9-cc41cfe1d075&question_id=84fe069d-c493-44da-ac87-f93d37ddfa8e&source_detail=9709%2F61+May%2FJune+2023) |
| [**9709/62** May/June 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-may-june-9709-62/#q-4) | **Q4** Poisson Distribution and Normal Approximation - CIE 9709 Jun 2023 Paper 62 Q4 | FRQ | 1 of 4 parts ((d)) | 3 of 10 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bf59edf7-7e34-448e-93f7-4eae7e3c7614&question_id=6d2fc92a-55c4-4854-8fbd-8fd9991a0723&source_detail=9709%2F62+May%2FJune+2023) |
| [**9709/62** May/June 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-may-june-9709-62/#q-5) | **Q5** Linear Combinations of Normal Variables - CIE 9709 Jun 2023 Paper 62 Q5 | FRQ | 3 parts ((a), (b)(i), (b)(ii)) | 11 | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bf59edf7-7e34-448e-93f7-4eae7e3c7614&question_id=b15e196d-e59a-4fd2-96ee-a76006d0e66a&source_detail=9709%2F62+May%2FJune+2023) |
| [**9709/63** May/June 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-may-june-9709-63/#q-4) | **Q4** Linear Combination of Normal Random Variables - CIE 9709 S23 Paper 63 Q4 | FRQ | 1 part | 6 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7c997abc-3f3f-417d-b55f-135f68c8fc81&question_id=e35818b1-ace7-4518-899c-68350eaf18e7&source_detail=9709%2F63+May%2FJune+2023) |
| [**9709/62** March 2023 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2023-march-9709-62/#q-5) | **Q5** Linear Combinations of Normal Cereal Packet Masses - CIE 9709 March 2023 Paper 62 Q5 | FRQ | 2 parts ((a), (b)) | 11 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=36ddbadd-413d-42bc-a7ad-f69ecc191173&question_id=f7d88bae-b99c-4508-9a04-eedc962944c9&source_detail=9709%2F62+March+2023) |
| [**9709/61** October/November 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-october-november-9709-61/#q-4) | **Q4** Sugar Sales Linear Combination - CIE A-Level Maths 2022 Nov Paper 61 Q4 | FRQ | 2 parts ((a), (b)) | 8 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9178b634-ff9a-4f53-beeb-a7291c712eb8&question_id=c2570378-7353-4aa7-b0a8-a92149f5979d&source_detail=9709%2F61+October%2FNovember+2022) |
| [**9709/62** October/November 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-october-november-9709-62/#q-6) | **Q6** Linear Combination of Flour Bag Masses - CIE 9709 Nov 2022 Paper 62 Q6 | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=795bf32c-c031-4c1e-869d-62f99f38e2fe&question_id=46a42f13-19a6-43a2-9d38-788a34a07100&source_detail=9709%2F62+October%2FNovember+2022) |
| [**9709/63** October/November 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-october-november-9709-63/#q-4) | **Q4** Sugar Sales Linear Combinations of Normal Variables - CIE A-Level Mathematics Q4 | FRQ | 2 parts ((a), (b)) | 8 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=06b0dd29-c7c5-4cb1-81ed-76f633794f5e&question_id=5181400c-5680-4093-b0e2-bf4e44a7c2cb&source_detail=9709%2F63+October%2FNovember+2022) |
| [**9709/61** May/June 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-may-june-9709-61/#q-3) | **Q3** Insect Length Comparison - CIE Statistics Q3 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d0ed09b6-1fa5-4462-8517-425c8c9ca93a&question_id=7c7a10d6-268a-4dd6-bc2e-36eb64582e7d&source_detail=9709%2F61+May%2FJune+2022) |
| [**9709/61** May/June 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-may-june-9709-61/#q-4) | **Q4** Poisson and Binomial Variables - CIE Statistics Q4 | FRQ | 1 of 2 parts ((a)) | 5 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d0ed09b6-1fa5-4462-8517-425c8c9ca93a&question_id=f05f2b66-32fb-49ea-a458-28c84adefdf2&source_detail=9709%2F61+May%2FJune+2022) |
| [**9709/61** May/June 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-may-june-9709-61/#q-5) | **Q5** Fuel Station Arrivals - CIE Statistics Q5 | FRQ | 1 of 3 parts ((c)) | 3 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d0ed09b6-1fa5-4462-8517-425c8c9ca93a&question_id=3b06513f-edef-4293-a5b9-70460f1276aa&source_detail=9709%2F61+May%2FJune+2022) |
| [**9709/62** May/June 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-may-june-9709-62/#q-6) | **Q6** Masses of Sack Linear Combination - CIE A Level Mathematics Q6 | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b561cb32-73fc-41a0-8d74-71e2a2ab2884&question_id=57a989a8-a349-4e69-b330-821ce244ccb8&source_detail=9709%2F62+May%2FJune+2022) |
| [**9709/63** May/June 2022 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2022-may-june-9709-63/#q-4) | **Q4** Seeds and Raisins Weight Linear Combinations - CIE A-Level Mathematics Q4 | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bfa9969a-81b8-43b1-9447-bf005a19606f&question_id=6d4b7718-de5e-493a-9d48-528072d4d510&source_detail=9709%2F63+May%2FJune+2022) |
| [**9709/61** October/November 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-october-november-9709-61/#q-6) | **Q6** Unbiased Estimates and Race Time Differences - CIE A Level Probability & Statistics Q6 | FRQ | 1 of 2 parts ((b)) | 5 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=4151eee1-49e3-41f7-b157-8751329a74e0&question_id=4c0ae73d-f637-444c-873c-b63227b4bca6&source_detail=9709%2F61+October%2FNovember+2021) |
| [**9709/62** October/November 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-october-november-9709-62/#q-1) | **Q1** Mass of Cheese Blocks - CIE A Level Mathematics 2021 Nov Paper 62 Q1 | FRQ | 1 of 2 parts ((b)) | 3 of 6 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=56c5403c-39cb-477e-a558-1c860c2f47e6&question_id=4f4cef45-1a6e-4835-9923-1411a44183eb&source_detail=9709%2F62+October%2FNovember+2021) |
| [**9709/62** October/November 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-october-november-9709-62/#q-5) | **Q5** Typing and Formatting Errors Poisson Distribution - CIE A Level Mathematics 2021 Nov Paper 62 Q5 | FRQ | 1 of 3 parts ((c)) | 3 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=56c5403c-39cb-477e-a558-1c860c2f47e6&question_id=7693efde-18f4-41d3-ab7e-b9f14467e6c0&source_detail=9709%2F62+October%2FNovember+2021) |
| [**9709/63** October/November 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-october-november-9709-63/#q-6) | **Q6** Unbiased Estimation and Linear Combination of Running Times - CIE A-Level Probability & Statistics 2 Q6 | FRQ | 1 of 2 parts ((b)) | 5 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ebfb10d3-1022-42d9-93d1-3b7c800fa5ee&question_id=54dddb29-d277-4978-a6dd-4968efd40d0b&source_detail=9709%2F63+October%2FNovember+2021) |
| [**9709/61** May/June 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-may-june-9709-61/#q-1) | **Q1** Accidents at Two Factories - CIE A-Level Mathematics | FRQ | 1 part | 4 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=06ef86fd-7b9a-4969-a9f3-8d5cc9f747b3&question_id=17e3ba76-2e92-4cae-abf5-d390f8125ee2&source_detail=9709%2F61+May%2FJune+2021) |
| [**9709/61** May/June 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-may-june-9709-61/#q-7) | **Q7** Masses of Flour Sacks - CIE A-Level Mathematics | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=06ef86fd-7b9a-4969-a9f3-8d5cc9f747b3&question_id=05259990-d2ab-4d25-be16-a4e53f8389d1&source_detail=9709%2F61+May%2FJune+2021) |
| [**9709/62** May/June 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-may-june-9709-62/#q-2) | **Q2** Binomial Distribution Properties and Approximation - CIE A-Level Maths 2021 Jun Q2 | FRQ | 1 of 3 parts ((a)) | 3 of 7 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ec6f00c8-7089-4018-92a7-a4ea178e7e0c&question_id=b2610165-0317-4fb4-92ce-b02becb7dbef&source_detail=9709%2F62+May%2FJune+2021) |
| [**9709/62** May/June 2021 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2021-may-june-9709-62/#q-4) | **Q4** Wendy's Journey Time Distribution - CIE A-Level Maths 2021 Jun Q4 | FRQ | 2 of 3 parts ((a), (b)) | 5 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ec6f00c8-7089-4018-92a7-a4ea178e7e0c&question_id=66f40b7b-f2e0-4666-9bab-799a56323187&source_detail=9709%2F62+May%2FJune+2021) |
| [**9709/61** October/November 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-october-november-9709-61/#q-1) | **Q1** White Flowers Poisson Approximation - CIE 9709 Nov 2020 Paper 61 Q1 | FRQ | 1 of 3 parts ((c)) | 3 of 7 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=93f29798-f845-4cf9-b116-efd0f6ef4f7c&question_id=46758446-6398-485b-b7a9-08184c9fbce3&source_detail=9709%2F61+October%2FNovember+2020) |
| [**9709/61** October/November 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-october-november-9709-61/#q-3) | **Q3** Masses of Male and Female Animals - CIE 9709 Nov 2020 Paper 61 Q3 | FRQ | 1 part | 6 | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=93f29798-f845-4cf9-b116-efd0f6ef4f7c&question_id=88903f6b-b6e5-45d0-b732-ffc2e4e89d62&source_detail=9709%2F61+October%2FNovember+2020) |
| [**9709/61** October/November 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-october-november-9709-61/#q-5) | **Q5** Worker Absences Poisson Hypothesis Testing - CIE 9709 Nov 2020 Paper 61 Q5 | FRQ | 1 of 5 parts ((b)) | 3 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=93f29798-f845-4cf9-b116-efd0f6ef4f7c&question_id=729e7cf1-4c36-4c44-811c-3b732ab28d4f&source_detail=9709%2F61+October%2FNovember+2020) |
| [**9709/61** May/June 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-may-june-9709-61/#q-3) | **Q3** Flour Sack Mass Distributions - CIE A-Level Mathematics P6 Q3 | FRQ | 2 parts ((a), (b)) | 10 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bf52d281-83f2-4bdd-9fd4-1492d428bc18&question_id=102ebaf1-9490-4266-915e-89c89541c52f&source_detail=9709%2F61+May%2FJune+2020) |
| [**9709/61** May/June 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-may-june-9709-61/#q-5) | **Q5** Sports Team Goal Scoring Poisson Model - CIE A-Level Mathematics P6 Q5 | FRQ | 1 of 4 parts ((a)(i)) | 2 of 10 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bf52d281-83f2-4bdd-9fd4-1492d428bc18&question_id=ab250f91-5bdf-487c-8a9e-bd478c070756&source_detail=9709%2F61+May%2FJune+2020) |
| [**9709/62** May/June 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-may-june-9709-62/#q-1) | **Q1** Plum Weight Distribution - CIE A-Level Mathematics Q1 | FRQ | 1 part | 4 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5d6b87fb-8432-4b24-9dc0-166382efbfb7&question_id=70a0a039-4a67-4531-899f-8a4db750f6ab&source_detail=9709%2F62+May%2FJune+2020) |
| [**9709/63** May/June 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-may-june-9709-63/#q-2) | **Q2** Linear Combination of Normal Variables for Gym Distances - CIE A-Level Probability & Statistics 2 | FRQ | 1 part | 5 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=301d205d-f5df-4144-87f0-11937fd09070&question_id=74abd00c-fee0-4267-9b2e-54b540b9f044&source_detail=9709%2F63+May%2FJune+2020) |
| [**9709/63** May/June 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-may-june-9709-63/#q-4) | **Q4** Poisson Distribution and Conditional Probability - CIE A-Level Probability & Statistics 2 | FRQ | 1 of 3 parts ((a)) | 3 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=301d205d-f5df-4144-87f0-11937fd09070&question_id=c0ac6a9a-6234-47c0-8d29-290360f46d80&source_detail=9709%2F63+May%2FJune+2020) |
| [**9709/62** March 2020 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2020-march-9709-62/#q-6) | **Q6** Tea Cups Volume Linear Combination - CIE S2 Q6 | FRQ | 2 parts ((a), (b)) | 10 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=4e648b27-3a9b-4c69-99c8-99a565c73b45&question_id=05db6cdc-28e8-4c3d-896a-88071565bb07&source_detail=9709%2F62+March+2020) |

## Related topic questions in Linear combinations of random variables

## Topic question rules and edge cases

**How many topic questions cover this syllabus point?**

64 question stems cover this subtopic across 40 papers, but only 90 tagged parts and 375 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page.

**Which papers include this subtopic?**

The table lists every matching session from 2020–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available.

**Why can one question appear under several subtopics?**

The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement.

**Can I practise these questions with AI marking?**

Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript.

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