Mathematics, 18.08.2021 18:00 IsabellaGracie
Extensive experience with fans of a certain type used in diesel engines has suggested that the exponential distribution provides a good model for X, time until failure. Suppose the mean time until failure is 25,000 hours. (a) Write down the pdf of X. (a) Find the cumulative distribution function of X. (b) What is the probability that a randomly selected fan will last between 20,000 and 30,000 hours
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