College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 8, Sequences and Series - Section 8.6 - The Binomial Theorem - 8.6 Exercises - Page 636: 17


$\left(\begin{array}{l} 6\\ 4 \end{array}\right)=15$

Work Step by Step

We evaluate: $\left(\begin{array}{l} 6\\ 4 \end{array}\right)=\frac{6!}{4!2!}=\frac{6*5*4!}{4!*2*1}=\frac{6*5}{2*1}=\frac{30}{2}=15$
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