Algebra and Trigonometry 10th Edition

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: 58


$15,504$ different groups.

Work Step by Step

The order in which the students are selected is not important. It is a combination of five students from a group of 20 students. $_{20}C_5=\frac{20!}{(20-5)!~5!}=\frac{20\times19\times18\times17\times16\times15!}{15!~5!}=\frac{1,860,480}{120}=15,504$
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