Question 268453: A market researcher needs to interview people who drive to work. in the area where the study is undertaken, 75% of the people who drive to work. if three people agree to be interviewed, what is the probability that at least one satisfies the requirement? what is the necessary assumption, and how does it apply?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A market researcher needs to interview people who drive to work. in the area where the study is undertaken, 75% of the people drive to work. If three people agree to be interviewed, what is the probability that at least one satisfies the requirement?
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Binomial with n = 3 ; p = 0.75
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P(at least one) = 1 - P(none)
P(at least one) = 1 - (0.25)^3 = 1 - 0.015625 = 0.9844
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Cheers,
Stan H.
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