2. A derangement is a permutation TE Sn with no fixed points, i.e. none of the elements remain in their original position. How many derangements of [n] are there?
2. A derangement is a permutation TE Sn with no fixed points, i.e. none of the elements remain in their original position. How many derangements of [n] are there?
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.4: Mathematical Induction
Problem 25E
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