#### Answer

$20$

#### Work Step by Step

$\dfrac {6!}{3!\times 3!}=\dfrac {3!\times 4\times 5\times 6}{3!\times 3!}=\dfrac {4\times 5\times 6}{3!}=\dfrac {4\times 5\times 6}{1\times 2\times 3}=20$

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$20$

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