Answer
$\approx0.259$
Work Step by Step
The formula for a binomial probability: $P(X=k)={n\choose k}p^k(1-p)^{n-k}$
Hence $P(X=1)={5\choose 1}0.4^1(1-0.4)^{5-1}\approx0.259$
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 19 - From Data Production to Inference: Part III Review - Test Yourself - Page 449: 19.47
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