. a closet contains n pairs of shoes. if 2r shoes are chosen at random (with 2r < n), what is the probability that there will be (a) no complete pair, (b) exactly one complete pair, (c) exactly two complete pairs among them?

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. a closet contains n pairs of shoes. if 2r shoes are chosen at random (with 2r < n), what is the probability that there will be (a) no complete pair, (b) exactly one complet…

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