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A box contains 20 red balls, 30 white balls, and 50 blue balls. a.) If 10 balls are selected at random, with replacement, what is

A box contains 20 red balls, 30 white balls, and 50 blue balls.

a.) If 10 balls are selected at random, with replacement, what is the probability that the selection contains exactly 3 red balls?

b.) if 10 balls are selected at random, with replacement, what is the probability that the selection consists of 2 red balls, 3 white balls, and 5 blue balls?

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