Question: Explain the branch probabilities listed on this tree diagram, which models the outcomes of selecting two different students from a class of 7 juniors and

Explain the branch probabilities listed on this tree diagram, which models the outcomes of selecting two different students from a class of 7 juniors and 14 sophomores.

20 21 3 14 7 20 10 -or- 21 3 20 0 2 JS 3e

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