Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 10 Counting Methods and Probability - 10.1 Apply the counting Principles and Permutations - 10.1 Exercises - Skill Practice - Page 687: 29

Answer

630

Work Step by Step

$$\frac{9!}{4!*4!}=9*8*7*6*5/24=3*7*6*5=21*30=\boxed{630}$$
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