Answer
$35$
Work Step by Step
$\binom 7 3 =\dfrac {7!}{3!\left( 7-3\right) !}=\dfrac {4!\times 5\times 6\times 7}{3!\times 4!}=\dfrac {5\times 6\times 7}{1\times 2\times 3}=35$
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 - 11.4 The Binomial Theorem - 11.4 Exercises - Page 1045: 16
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