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28. The lifetime of a new brand of light bulb follows an exponential distribution with a mean of 2000 hours of use. Find the probability

28. The lifetime of a new brand of light bulb follows an exponential distribution with a mean of 2000 hours of use. Find the probability that a randomly selected light bulb will last exactly 2000 hours. a) .367879 b .632121 C .867879 d) 0

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