SOLUTION: The probability that a certain make of car will need repairs in the first six months is 0.39 . A dealer sells 7 such cars. What is the probability that at least one of them will re

Question 919545: The probability that a certain make of car will need repairs in the first six months is 0.39 . A dealer sells 7 such cars. What is the probability that at least one of them will require repairs in the first six months?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The probability that a certain make of car will need repairs in the first six months is 0.39 . A dealer sells 7 such cars. What is the probability that at least one of them will require repairs in the first six months?
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Binomial Problem with n = 7 ; p(need repair) = 0.39 ; p(not need) = 0.61
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P(at least 1 need) = 1 - P(none need repair) = 1 - 0.61^7 = 0.9686
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Cheers,
Stan H.
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