Answer
$_7C_6=7$
Work Step by Step
$_nC_r=\frac{n!}{(n-r)!\times r!}$
$_7C_6=\frac{7!}{(7-6)!\times(6!)}=\frac{7\times6!}{1!\times6!}=\frac{7}{1}=7$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 11 - 11.5 - The Binomial Theorem - 11.5 Exercises - Page 813: 6
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