Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 11 - Probability and Statistics - Chapter Review: 9

Answer

21

Work Step by Step

7C2 Write as factorials: $\frac{7!}{2!5!}$ Expand: $\frac{7\times6\times5\times4\times3\times2\times1}{2\times1\times5\times4\times3\times2\times1}$ =42/2 =21
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