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Q5 Suppose the lifetime in months of an engine, working under hazardous conditions, has a Gamma distribution with a mean of 5 months and a

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Q5 Suppose the lifetime in months of an engine, working under hazardous conditions, has a Gamma distribution with a mean of 5 months and a variance of 10 months squared. (a) Determine the median lifetime of an engine. (b) Suppose such an engine is termed successful if its lifetime exceeds 10 months. In a sample of 10 engines, determine the probability of at least 2 successful engines

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