SOLUTION: Thirty percent of people enrolled in stats class miss class following an exam. In a random sample what is the probability that exactly one will miss?

Question 428120: Thirty percent of people enrolled in stats class miss class following an exam. In a random sample what is the probability that exactly one will miss?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Thirty percent of people enrolled in stats class miss class following an exam. In a random sample what is the probability that exactly one will miss?
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Assuming the sample has size = n,
P(x = 1) = nC1(0.30)*(0.70)^(n-1)

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If sample size = 13
P(x=1) = 13C1(0.3)*(0.7)^12 = 0.0540
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Cheers,
Stan H.
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