# Topic Questions: 5.4 The discrete uniform distribution. — WST01 Discrete random variables > 19 WST01 Discrete random variables topic questions (31 marks) on 5.4 The discrete uniform distribution. — 10 papers, 2015–2026. Open the exact question in… - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/5-4-the-discrete-uniform-distribution/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/5-4-the-discrete-uniform-distribution/index.md --- Edexcel IAL · Mathematics · WST01 · Discrete random variables 19 WST01 Discrete random variables topic questions are tagged to this syllabus point across 10 papers (2015–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved. - 19 topic questions - 10 papers - 31 tagged marks - 8.4% of topic questions - 5.6% of topic marks - 2015–2026 - Syllabus 2014–current - [All WST01 Discrete random variables topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Discrete random variables syllabus point appears in 10 WST01 papers across 2015–2026, contributing 19 topic questions and 31 marks.** The most recent appearance is WST01/01 January 2026. That equals 8.4% of the 227 topic questions and 5.6% of the 550 marks tagged to Discrete 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 | | --- | --- | --- | --- | --- | --- | --- | | [**WST01/01** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2026-january-wst01-01/#q-6) | **Q6** Discrete Uniform Distribution - Edexcel IAL S1 Jan 2026 Q6 | FRQ | 3 parts ((a), (b), (c)) | 10 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24109888-8a15-4c84-8b20-c8c4906c9e9f&question_id=43a35be2-ce92-411b-980f-54c4d36b5036&source_detail=WST01%2F01+January+2026) | | [**WST01/01** October 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2025-october-wst01-01/#q-3) | **Q3** Fair 6-sided Die Discrete Uniform Distribution | FRQ | 2 of 3 parts ((a), (b)) | 3 of 6 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=25b5937a-ecc4-4683-af4d-df8053d3ef1d&question_id=5ee6e050-d71b-4acd-9523-b2ade73be794&source_detail=WST01%2F01+October+2025) | | [**WST01/01** January 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2025-january-wst01-01/#q-1) | **Q1** Discrete Random Variables and Distributions - Edexcel IAL S1 Jan 2025 Q1 | FRQ | 1 of 8 parts ((a)) | 1 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7c231f6c-f773-49d3-90ff-374502de2488&question_id=e968aaeb-5eea-4b13-9942-2b808a390e2e&source_detail=WST01%2F01+January+2025) | | [**WST01/01** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2022-january-wst01-01/#q-4) | **Q4** Discrete Uniform Distribution - Edexcel IAL S1 Jan 2022 Q4 | FRQ | 2 of 6 parts ((a), (b)) | 4 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7de5bf95-3af8-43f6-ab08-d335d399d3b1&question_id=fdf722a8-f2d7-497f-85b6-d8bfc7ce48b9&source_detail=WST01%2F01+January+2022) | | [**WST01/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2021-january-wst01-01/#q-4) | **Q4** Discrete Uniform Distribution & Random Variables - Edexcel IAL S1 Jan 2021 Q4 | FRQ | 2 of 7 parts ((a), (b)(i)) | 2 of 16 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=47377eb9-33d0-48b6-bf89-6bfd7f53bfef&question_id=0d727b8e-a7b3-481f-9fdb-ed0a13ecf6dd&source_detail=WST01%2F01+January+2021) | | [**WST01/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2020-october-wst01-01/#q-6) | **Q6** Discrete and Normal Distributions - Edexcel IAL S1 Oct 2020 Q6 | FRQ | 2 of 7 parts ((c), (d)) | 2 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d767123a-c14c-4339-8451-efe3392dc3f6&question_id=c0907c8e-2839-4e3b-a88d-10eed0844f45&source_detail=WST01%2F01+October+2020) | | [**WST01/01** October 2017 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2017-october-wst01-01/#q-6) | **Q6** Discrete random variables and expectations - Edexcel IAL S1 Oct 2017 Q6 | FRQ | 1 of 8 parts ((a)) | 1 of 17 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46dbee62-0633-41cd-9df6-71e49b160803&question_id=0934bb81-3d9e-4aaa-93b1-a659994d22ce&source_detail=WST01%2F01+October+2017) | | [**WST01/01** January 2017 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2017-january-wst01-01/#q-4) | **Q4** Discrete Random Variables - Edexcel IAL S1 Jan 2017 Q4 | FRQ | 1 of 6 parts ((d)) | 1 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1a9f502e-3d00-4385-8f4c-18d60b758de8&question_id=49c3fd40-4aff-43ca-bc7b-e0a5d233c7fc&source_detail=WST01%2F01+January+2017) | | [**WST01/01** June 2016 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2016-june-wst01-01/#q-3) | **Q3** Discrete Uniform Distribution Properties - Edexcel IAL S1 June 2016 Q3 | FRQ | 1 of 8 parts ((a)) | 1 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b4b356b9-e8c0-47d1-ad81-a1cb08b96a9f&question_id=616bdd1e-09de-47ab-ac08-bd0437433774&source_detail=WST01%2F01+June+2016) | | [**WST01/01** June 2015 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2015-june-wst01-01/#q-6) | **Q6** Discrete Uniform Distribution - Edexcel IAL S1 June 2015 Q6 | FRQ | 4 of 6 parts ((a), (b), (c), (d)) | 6 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=589427ba-c1ca-4d7f-b977-5339870547b9&question_id=612adf47-e9e8-43d3-aee2-e0326aa6764a&source_detail=WST01%2F01+June+2015) | ## Related topic questions in Discrete random variables - [5.1 The concept of a discrete random variable.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/5-1-the-concept-of-a-discrete-random-variable/) — 17 question items · 11 papers — 46 marks · 2015–2025 - [5.2 The probability function and the cumulative distribution function for a discrete random variable.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/5-2-the-probability-function-and-the-cumulative-distribution-function-for-a-discrete/) — 112 question items · 35 papers — 276 marks · 2014–2026 - [5.3 Mean and variance of a discrete random variable.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/5-3-mean-and-variance-of-a-discrete-random-variable/) — 120 question items · 36 papers — 326 marks · 2014–2026 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 10 question stems cover this subtopic across 10 papers, but only 19 tagged parts and 31 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 2015–2026. 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. --- Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/5-4-the-discrete-uniform-distribution/