Answer
P(38) = 0.0532
Work Step by Step
Using formula $P(x) = _{n}C_{x}p^{x}(1-p)^{(n-x)}$, we have:
P(38) = $_{40}C_{38}0.99^{38}(1-0.99)^{(40-38)}$
= 780. 0.6826 . 0.0001
= 0.0532
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