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A box has 20 yellow balls and 30 green balls. You randomly select 7 balls from the box. Find: 1. P(you select exactly 3 yellow

A box has 20 yellow balls and 30 green balls. You randomly select 7 balls from the box.

Find:

1. P(you select exactly 3 yellow balls) =

2. P(you select less than or equal to 3 yellow balls) =

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