Edexcel IAL · Mathematics · WST01 · Discrete random variables
Topic Questions: 5.1 The concept of a discrete random variable. — WST01 Discrete random variables
17 WST01 Discrete random variables topic questions are tagged to this syllabus point across 11 papers (2015–2025). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved.
Core finding
This Discrete random variables syllabus point appears in 11 WST01 papers across 2015–2025, contributing 17 topic questions and 46 marks. The most recent appearance is WST01/01 June 2025. That equals 7.5% of the 227 topic questions and 8.4% 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 |
|---|---|---|---|---|---|---|
| WST01/01June 2025 · Edexcel IAL | Q1 Discrete Random Variables - Edexcel IAL June 2025 S1 Q1 |
FRQ | 1 of 5 parts ((b)) | 2 of 9 on the paper |
Easy | Go to Practice Hub |
| WST01/01January 2024 · Edexcel IAL | Q7 Discrete Random Variable Cumulative Distribution - Edexcel IAL S1 Jan 2024 Q7 |
FRQ | 1 of 4 parts ((c)) | 1 of 10 on the paper |
Easy | Go to Practice Hub |
| WST01/01June 2023 · Edexcel IAL | Q5 Discrete Random Variables - Edexcel IAL S1 Jun 2023 Q5 |
FRQ | 1 of 5 parts ((d)) | 3 of 13 on the paper |
Medium | Go to Practice Hub |
| WST01/01October 2022 · Edexcel IAL | Q7 Discrete Probability Distribution and Multi-variable Joint Events - Edexcel IAL S1 Oct 2022 Q7 |
FRQ | 3 of 6 parts ((a), (e), (f)) | 8 of 14 on the paper |
Easy | Go to Practice Hub |
| WST01/01January 2022 · Edexcel IAL | Q1 Venn Diagrams and Probability - Edexcel IAL S1 Jan 2022 Q1 |
FRQ | 1 of 6 parts ((f)) | 3 of 11 on the paper |
Easy | Go to Practice Hub |
| WST01/01January 2022 · Edexcel IAL | Q4 Discrete Uniform Distribution - Edexcel IAL S1 Jan 2022 Q4 |
FRQ | 1 of 6 parts ((c)) | 2 of 13 on the paper |
Easy | Go to Practice Hub |
| WST01/01January 2022 · Edexcel IAL | Q7 Hypergeometric Probability and CDF - Edexcel IAL S1 Jan 2022 Q7 |
FRQ | 1 of 3 parts ((b)) | 1 of 11 on the paper |
Medium | Go to Practice Hub |
| WST01/01October 2021 · Edexcel IAL | Q4 Probability Tree Diagram and Discrete Random Variables - Edexcel IAL S1 Oct 2021 Q4 |
FRQ | 1 of 5 parts ((d)) | 3 of 13 on the paper |
Medium | Go to Practice Hub |
| WST01/01October 2021 · Edexcel IAL | Q5 Discrete Random Variables and Pythagoras - Edexcel IAL S1 Oct 2021 Q5 |
FRQ | 1 of 4 parts ((d)) | 6 of 14 on the paper |
Medium | Go to Practice Hub |
| WST01/01June 2021 · Edexcel IAL | Q5 Discrete Random Variables - Edexcel IAL S1 Jun 2021 Q5 |
FRQ | 1 of 5 parts ((d)) | 5 of 15 on the paper |
Easy | Go to Practice Hub |
| WST01/01January 2021 · Edexcel IAL | Q4 Discrete Uniform Distribution & Random Variables - Edexcel IAL S1 Jan 2021 Q4 |
FRQ | 1 of 7 parts ((e)) | 2 of 16 on the paper |
Easy | Go to Practice Hub |
| WST01/01October 2018 · Edexcel IAL | Q5 Discrete Random Variables, CDF and Linear Transformations - Edexcel IAL S1 Oct 2018 Q5 |
FRQ | 2 of 4 parts ((a), (d)) | 6 of 14 on the paper |
Medium | Go to Practice Hub |
| WST01/01June 2017 · Edexcel IAL | Q6 Discrete random variables - Edexcel IAL S1 June 2017 Q6 |
FRQ | 1 of 7 parts ((e)) | 3 of 17 on the paper |
Medium | Go to Practice Hub |
| WST01/01June 2015 · Edexcel IAL | Q6 Discrete Uniform Distribution - Edexcel IAL S1 June 2015 Q6 |
FRQ | 1 of 6 parts ((f)) | 1 of 9 on the paper |
Easy | Go to Practice Hub |
Related topic questions in Discrete random variables
Topic question rules and edge cases
- How many topic questions cover this syllabus point?
- 14 question stems cover this subtopic across 11 papers, but only 17 tagged parts and 46 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 2015–2025. 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.