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 the full answer
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Related Book For
Discrete and Combinatorial Mathematics An Applied Introduction
ISBN: 978-0201726343
5th edition
Authors: Ralph P. Grimaldi
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