GCSE Maths: Frequency Trees
Complete a frequency tree and use it to find probabilities. Practise it with adaptive questions for AQA, Edexcel, OCR and Eduqas.
What you need to know
The concepts examiners test on frequency trees, and what each one is really asking.
Where marks get lost
The exam technique that separates a correct method from a correct answer.
- Putting probabilities on the branches instead of frequencies
- Not checking that each pair of branches adds back to the number before it
- Using the wrong total as the denominator when the question says "given that"
- Filling the tree left to right when the information given starts at the far end
Frequency Trees questions students ask
Is Frequency Trees on the Foundation paper?
Yes. Frequency Trees appears at both Foundation and Higher tier, though Higher papers take it further.
What should I know before starting Frequency Trees?
It builds on Addition and subtraction and Basic probability and Two way tables. If those feel shaky, practise them first — Frequency Trees questions assume them.
What is the most common mistake in Frequency Trees?
Putting probabilities on the branches instead of frequencies.
Which exam boards cover Frequency Trees?
All four we support — AQA, Edexcel, OCR and Eduqas. GCSE Maths subject content is set by the DfE, so the topic is common to every board; what changes is the paper structure and the grade boundaries.