SOLUTION: Suppose that the probability that a particular brand of light bulb fails before 900 hours of use is 0.2. If you purchase 3 of these light bulbs, what is the probability that at lea
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Question 352924: Suppose that the probability that a particular brand of light bulb fails before 900 hours of use is 0.2. If you purchase 3 of these light bulbs, what is the probability that at least one of them lasts 900 hours or more? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Suppose that the probability that a particular brand of light bulb fails before 900 hours of use is 0.2. If you purchase 3 of these light bulbs, what is the probability that at least one of them lasts 900 hours or more?
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P(at least one in 3) = 1 - P(none of 3 lasts 900 hrs)
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= 1 - (0.2)^3
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= 1 - 0.008
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= 0.992
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Cheers,
Stan H.
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