In a survey, 66% of Americans said they own an answering machine. If 17 Americans are...

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Question

In a survey, 66% of Americans said they own an answering machine. If 17 Americans are selected at random, find the probabilit

math Statistics-And-Probability

Answer 1

Answer #1

$p=66\%=0.66, n=17$

Let $q=1-p=0.34$

$P(x)=n_{C_{x}}(q)^{n-x}(p)^{x}$

$P(9)=17_{C_{9}}(0.34)^{17-9}(0.66)^{9}=24310(0.34)^{8}(0.66)^{9}=0.1032$

Answer 2

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