What is the probability at least one is red

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-A bag contains 12 red marbles and 8 black marbles. Two marbles are taken out, one after the other where the first marble was replaced. What is the probability that both marbles are red?

-A bag contains 12 red marbles and 8 black marbles. Three marbles are taken out, one after the other where the previous marble is not replaced. What is the probability at least one is red?

Reference no: EM132855882

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