Question: Let D be an exponential random variable with parameter lambda = 2 that models the lifetime (in years) of a dolphin. Given the dolphin has

Let D be an exponential random variable with parameter lambda = 2 that models the lifetime (in years) of a dolphin. Given the dolphin has lasted 2 years, find the probability that it lives for at least b more years for any positive integer b. P(D >= b +2|D>=2) =

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