[Solved] Suppose 20 people visit a shopping mall.

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Suppose 20 people visit a shopping mall. Suppose there are 25 stores in the mall, and each of the 20 people chooses 3 of the

Suppose 20 people visit a shopping mall. Suppose there are 25 stores in the mall, and each of the 20 people chooses 3 of the 25 stores at random to visit. On average, how many of the stores will not be visited by any of the 20 people?

solve it correctly please. I will rate accordingly. Need correct answer..

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