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Tree diagrams including conditional probability
Practice Questions

20 AQA GCSE Mathematics questions on Tree diagrams including conditional probability, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Tree diagrams including conditional probability.

Try 2 sample questions on Tree diagrams including conditional probability

Question 1 · 1 mark · Difficulty 1/3

A tree diagram is drawn for two events A and B. Which expression correctly gives P(A and B)?

  1. A) P(A) + P(B)
  2. B) P(A) × P(B | A)
  3. C) P(B) × P(A | B) + P(A)
  4. D) P(A) + P(B) − P(A or B)
Show answer & explanation
✓ Answer: B — B) P(A) × P(B | A)
The multiplication rule states P(A and B) = P(A) × P(B | A), which is equivalent to multiplying along the branches of a tree diagram. Option A is the addition rule for mutually exclusive events and does not give the intersection.
Question 2 · 1 mark · Difficulty 2/3

A bag contains 3 red and 2 blue counters. One counter is drawn and not replaced. A second counter is then drawn. What is the probability that both counters are red?

  1. A) 3/10
  2. B) 9/25
  3. C) 6/25
  4. D) 1/2
Show answer & explanation
✓ Answer: A — A) 3/10
P(red first) = 3/5. After removing a red, 2 red and 2 blue remain, so P(red second | red first) = 2/4 = 1/2. Multiplying gives 3/5 × 1/2 = 3/10. Option B incorrectly uses replacement, and D ignores probability entirely.
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20 questions · 25 min · free

AQA GCSE Mathematics: Tree diagrams including conditional probability FAQ

How many AQA GCSE Mathematics questions on Tree diagrams including conditional probability are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Tree diagrams including conditional probability for AQA GCSE Mathematics, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real AQA paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for AQA GCSE students preparing for Mathematics?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Tree diagrams including conditional probability practice with other Mathematics topics or even switch to a totally different AQA subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Tree diagrams including conditional probability questions aligned to the official AQA GCSE Mathematics syllabus?
Every question is written against the published AQA GCSE Mathematics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real AQA paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from AQA.
How is Tree diagrams including conditional probability typically tested on AQA GCSE Mathematics papers?
Tree diagrams including conditional probability appears across multiple question types on real AQA GCSE Mathematics papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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