Answer
$C(15,15)=1$
Work Step by Step
Using the combination formula, we obtain:
$C(n,r)=\frac{n!}{(n-r)!r!}$
$C(15,15)=\frac{15!}{(15-15)!15!}=\frac{15!}{0!15!}=\frac{15!}{15!\cdot1}=1$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 10 - Section 10.2 - Permutations and Combinations - 10.2 Assess Your Understanding - Page 695: 19
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