Discrete Mathematics with Applications 4th Edition

Published by Cengage Learning
ISBN 10: 0-49539-132-8
ISBN 13: 978-0-49539-132-6

Chapter 9 - Counting and Probability - Exercise Set 9.7 - Page 603: 2

Answer

$n$

Work Step by Step

The expression is $\frac{n!}{(n-1)!1!}$ which simplifies to$\frac{n!}{(n-1)!}$ which is just $n$ by definition of factorial.
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