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Conditional probability:Tree diagrams

Counters taken without replacement, so the second set of branches changes. Fill in the tree, multiply along the branches, then add two routes for one of each colour or two the same.

A free GCSE Higher probability lesson on conditional probability: tree diagrams, spec code P9. It has a lesson deck to teach from with a visualiser, a worksheet with answers, a puzzle, an exit ticket, an end of unit test and a method video.

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