MA36-02 Maths Coming soon
Combining probabilities on a tree diagram
MA36-02
This lesson is coming soon.
In this lesson
Calculate the probability of a specific outcome from a completed tree diagram by multiplying probabilities along a branch path and adding probabilities across separate paths.
What it covers
- Multiplying the probabilities along a single branch path to find the probability of that exact outcome
- Identifying which paths on a tree satisfy the outcome asked for
- Adding the probabilities of multiple qualifying paths together
- Using a tree diagram that has already been fully constructed and labelled
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300, Edexcel IGCSE 4MA1, OCR GCSE J560
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | P6 | Enumerate sets and combinations of sets systematically, using tables, grids, Venn diagrams |
| Edexcel GCSE 1MA1 | P6 | Enumerate sets and combinations of sets systematically, using tables, grids, Venn diagrams and tree diagrams |
| Eduqas GCSE C300 | FP6 | Enumerate sets and combinations of sets systematically, using tables, grids, Venn diagrams and tree diagrams |
| Eduqas GCSE C300 | HP6 | Enumerate sets and combinations of sets systematically, using tables, grids, Venn diagrams and tree diagrams |
| Edexcel IGCSE 4MA1 | H6.3A | Draw and use tree diagrams |
| OCR GCSE J560 | 11.02d | Use tree diagrams to enumerate sets and to record the probabilities of successive events (tree frames may be given and in some cases will be partly completed). |
For teachers
This GCSE Maths lesson teaches combining probabilities on a tree diagram. By the end, students should be able to calculate the probability of a specific outcome from a completed tree diagram by multiplying probabilities along a branch path and adding probabilities across separate paths. It works through two worked examples and the mistakes examiners report.