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Explain please Suppose that Y is the lifetime (in hours) ofa product and Y has an exponential distribution with mean 2.5. (a) Write the pdf

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Explain please

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Suppose that Y is the lifetime (in hours) ofa product and Y has an exponential distribution with mean 2.5. (a) Write the pdf of Y. (b) Write the ggfof Y. (c) Find the probability that the lifetime of a randomly selected product does not exceed 1 hour. Simplify your answer and keep at least 4 decimal places. (d) Find the probability that the lifetime of a randomly selected product is between 1 and 3 hours. Simplify your answer and keep at least 4 decimal places

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