Climb out on a branch to find probabilities. Using tree diagrams, the resource shows how to find compound probabilities when the events are not uniform. The video works through two different scenarios, one where the probabilities remain consistent and one where they change depending upon the outcome of the first event. Worksheets provide additional practice to cement the concept.

Concepts

tree diagrams, probability, compound probability

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Additional Tags

math

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Instructional Ideas

• Use tree diagrams for uniform probabilities to develop the rules for compound probabilities

Classroom Considerations

• Uses British pronunciation of decimals
• To do all the problems on the worksheet, pupils must understand multiplication of algebraic fractions

Pros

• Calculates the probabilities for all branches before answering the questions
• Explains the rules for determining probabilities of compound events

Cons

• None

Common Core

7.SP.C.8.a 7.SP.C.8.b MP4 MP5