Question 919675: Keith’s Florists has 15 delivery trucks, used mainly to deliver flowers and flower arrangements in the Greenville, South Carolina, area. Of these 15 trucks, 7 have brake problems. A sample of 5 trucks is randomly selected. What is the probability that 2 of those tested have defective brakes?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Keith’s Florists has 15 delivery trucks, used mainly to deliver flowers and flower arrangements in the Greenville, South Carolina, area. Of these 15 trucks, 7 have brake problems. A sample of 5 trucks is randomly selected. What is the probability that 2 of those tested have defective brakes?
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Binomial Problem with n = 5, p(defect) = 7/15
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P(x = 2) = 5C2*(7/15)^2*(8/15)^3 = binompdf(5,7/15,2) = 0.3304
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Cheers,
Stan H.
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