Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 12 - Data Analysis and Probability - 12-6 Permutations and Combinations - Lesson Check: 5

Answer

10

Work Step by Step

We know that: $_nC_r =\frac{_nP_r}{r!} = \frac{n!}{(n-r)!r!}$ $\frac{5!}{(5-3)!3!}$ $\frac{5*4*3*2*1}{3*2*1*2*1}$ 10
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