Precalculus (6th Edition)

by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie

Published by Pearson

ISBN 10: 013421742X

ISBN 13: 978-0-13421-742-0

Chapter 11 - Further Topics in Algebra - Test - Page 1085: 16

Answer

$45$

Work Step by Step

$C(10,2)=\frac{10!}{2!(10-2)!}=\frac{10!}{2!(8)!}=\frac{10\times9}{2\times1}=45$

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