College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 8 - Sequences, Induction, and Probability - Exercise Set 8.5 - Page 757: 2

Answer

$21$

Work Step by Step

Apply the formula used for solving binomial coefficients. $\frac{7!}{(7-2)!\times2!}$ $\frac{7!}{(5)!\times2!}$ $21$
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