#### 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

Published by
Prentice Hall

ISBN 10:
0133186024

ISBN 13:
978-0-13318-602-4

21

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