Tree Diagram
A visual representation of sequential events where branches show possible outcomes at each stage, with conditional probabilities written on each branch and final probabilities calculated by multiplying along paths.
Real World
The BBC used tree diagrams to model the probability of England reaching successive knockout rounds in the 2018 World Cup, multiplying branch probabilities to estimate the overall chance of winning the tournament.
Exam Focus
Always label conditional probabilities on branches and verify each set of branches sums to 1 before calculating.
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