Tree diagrams GCSE questions
Tree diagrams GCSE questions with worked answers. Attempt them first, then check. Full method is on the Tree diagrams lesson.
How to use this page
Cover the answers. Write your working. Then compare. Interactive marking and a personalised plan are on ReviseEasy.
Practice questions
Cover the answers and have a go first. Worked solutions are underneath.
A coin twice. P(two heads)?
P(A) = 0.4 independent of P(B) = 0.5. P(both)?
Bag: 3 red, 2 blue. Two sweets without replacement. P(both red)?
Common mistakes
- Adding along a branch instead of multiplying.
- Using the same second-branch probabilities when the first item was not replaced.
Answers and working
Frequently asked questions
Where is the full lesson?
See Tree diagrams: https://revise-easy.com/gcse-maths/probability/tree-diagrams/
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