IB Math AI HL · 2021 to 2025

4.9 Normal distribution

31 past paper questions from 8 papers across 6 exam sessions. See what repeats, then practise the same skills with AI marking.

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HL archive · 2021 to 2025

4.9 Normal distribution

Latest exam session: May 2025

questions
31
questions
papers
8
papers
exam sessions
6
exam sessions
micro-topics
1

Micro-topics in 4.9 Normal distribution

In syllabus order. The ring is the share of papers each appears in.

  • 15

    4.9.2

    Normal Probabilities

    31 questions · in 15% of papersAppears in 8 of the 54 Math AI HL papers analysed (15%), at least once each.

    Occasional

    last May 25 P2 TZ3

Exam pattern

How often each micro-topic has been examined, year by year. Each label is explained under the grid.

Does it repeat?

Questions per year for each micro-topic.

fewermore

Micro-topic202120222023202420252026
4.9.2Normal ProbabilitiesOccasional
8Normal Probabilities, 2021: 8 questions·Normal Probabilities, 2022: 0 questions8Normal Probabilities, 2023: 8 questions10Normal Probabilities, 2024: 10 questions5Normal Probabilities, 2025: 5 questions·Normal Probabilities, 2026: 0 questions
  • Occasionalin about one paper in ten

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Questions on 4.9 Normal distribution, by exam session

Which papers asked about 4.9 Normal distribution, and which question numbers. Open a paper to see them highlighted.

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Frequently asked questions

Short answers about this page.

Which Math AI HL exam sessions are covered for 4.9 Normal distribution?

11 exam sessions from 2021 to 2025, the latest May 2025. Every Paper 1 and 2 in every timezone is read and classified in full, which gives 8 papers in this archive.

Which 4.9 Normal distribution topic comes up most?

Normal Probabilities (4.9.2): in 15% of papers, last seen May 25 P2 TZ3. Usually "find / solve", worth about 9 marks in a paper that includes it.

Can I see the original question and mark scheme?

No. The wording belongs to the IB. You get the citation, the marks, the command term and the skill tested, plus our own matched practice questions with worked answers and AI marking.

What do "banker", "due" and "rising" mean?

Banker: examined in at least one sitting in four and still appearing. Due: regular before, but absent for the last two exam sessions. Rising: clearly more common in the last two years. Our classification of real papers, not an IB statistic.

What is free and what needs Pro?

Reading this page and the exam pattern is free. A free account generates three sets of ten questions and launches one practice set. Pro opens every question in any scope, sets of twenty or all, and unlimited practice.

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