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Find the average number of people who draw their own names

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Reference no: EM131682305

Question: Each of n 2 people puts his or her name on a slip of paper (no two have the same name). The slips of paper are shuffled in a hat, and then each person draws one (uniformly at random at each stage, without replacement). Find the average number of people who draw their own names.

Reference no: EM131682305

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