Answer
In EXCEL, select a cell and enter "=COMBIN(20;6)"
$_{20}C_6=38760$
Work Step by Step
$_{20}C_6=\frac{20!}{(20-6)!\times6!}=\frac{20\times19\times18\times17\times16\times15\times14!}{14!\times6\times5\times4\times\times2\times1}=38760$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 11824 - 11.6 - Counting Principles - 11.6 Exercises - Page 824: 55
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