Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321755936
ISBN 13: 978-0-32175-593-3

Chapter 4 - Discrete Random Variables - Exercises 4.50 - 4.76 - Learning the Mechanics - Page 204: 4.53b

Answer

10

Work Step by Step

$\begin{pmatrix} 5 \\ 2 \end{pmatrix}=\frac{5!}{2!(5-2)!}=\frac{5\times4\times3!}{2!\times3!}=\frac{5\times4}{2\times1}=10$
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