SOLUTION: A quality control engineer tests the quality of produced computers. Suppose that 5% of computers have defects, and defects occur independently of each other. Find the probability t

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Question 504814: A quality control engineer tests the quality of produced computers. Suppose that 5% of computers have defects, and defects occur independently of each other. Find the probability that the engineer has to test at least 5 computers in order to find a defective one.
Answer by stanbon(75887) About Me  (Show Source):
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A quality control engineer tests the quality of produced computers.
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Suppose that 5% of computers have defects, and defects occur independently of each other. Find the probability that the engineer has to test at least 5 computers in order to find a defective one.
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P(1st 4 are without defect) = 0.95^4 = 0.8145
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P(test at least 5 to find a defective one) = 0.8145
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Cheers,
Stan H.
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