- Tree Diagram: A visual representation of all possible outcomes in multi-stage events
- Each branch represents a possible outcome at each stage
- Probabilities on branches from the same point must add up to 1
- Multiplication Rule: Multiply probabilities along a path to find the probability of that specific sequence
- Addition Rule: Add probabilities of different paths that lead to the same final event
- Tree diagrams work for both independent and dependent events
This key facts covers Key Facts within Tree Diagrams for GCSE Mathematics. Revise Tree Diagrams in Probability for GCSE Mathematics with 15 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 7 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Tree Diagrams
A fair coin is flipped twice. In a tree diagram, what must the probabilities on the branches from the same point always add up to?
Explain the two key rules used when calculating probabilities from a tree diagram. Your answer should refer to both the multiplication rule and the addition rule.
Quick recall flashcards
What does each branch in a tree diagram represent?
A possible outcome at that stage of the experiment
What is a tree diagram?
A visual representation of all possible outcomes in multi-stage events