Discrete Mathematics with Applications 4th Edition

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

Chapter 5 - Sequences, Mathematical Induction, and Recursion - Exercise Set 5.1 - Page 244: 72

Answer

$35$

Work Step by Step

$=7!\div4!(7-4)!$ $=(7\times6\times5)\div(3\times2\times1)$ $=35$
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