Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 5 - Discrete Probability Distributions - 5-3 Binomial Probability Distributions - Basic Skills and Concepts: 24

Answer

0.01259

Work Step by Step

Using the Binomial Probability formula the probability is: $P(X=9)={11\choose 9} \cdot (0.45)^9\cdot (0.55)^2=0.01259.$
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