Question: How many permutations of 1, 2, 3, 4, 5, 6, 7 are not derangements?

How many permutations of 1, 2, 3, 4, 5, 6, 7 are not derangements?

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There are 7 5040 permutations of 1 2 3 4 5 ... View full answer

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