Answer
0.01259
Work Step by Step
Using the Binomial Probability formula the probability is: $P(X=9)={11\choose 9} \cdot (0.45)^9\cdot (0.55)^2=0.01259.$
Elementary Statistics (12th Edition)
by Triola, Mario F.
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 - Page 219: 24
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