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A box contains seven white balls and three red balls. Two balls are randomly selected without replacement. (a) Find the probability that the second ball

A box contains seven white balls and three red balls. Two balls are randomly selected without replacement. (a) Find the probability that the second ball is red given that the first ball is white. (b) Find the probability that the first ball is white and the second ball is red. (c) If the balls are selected with replacement, find the probability that the first ball is white and the second ball is red. (d) If the balls are selected with replacement, find the probability that both balls are white.

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