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A bag contains 3 white, 4 black and 5 red marbles. You draw 4 of them...

A bag contains 3 white, 4 black and 5 red marbles. You draw 4 of them at random. (A) Find the probability that you draw 2 white, 1 black, and 1 red marble (B) Find the probability that you draw at least 1 red marble

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