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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Combinatorics
couples sit together?
2. A derangement is a permutation T E Sn with no fixed points, i.e. none of
the elements remain in their original position. How many derangements
of [n] are there?
A
2
PRE
55000
Transcribed Image Text:couples sit together? 2. A derangement is a permutation T E Sn with no fixed points, i.e. none of the elements remain in their original position. How many derangements of [n] are there? A 2 PRE 55000
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