Question: 12 Suppose that X, the interarrival time between two customers entering a certain post office, satisfies P(X1)=ae + Be 10, where a + 8 =
12 Suppose that X, the interarrival time between two customers entering a certain post office, satisfies P(X1)=ae + Be 10, where a + 8 = 1, a 0, 80, > 0, >0. Calculate the expected value of X. Hint: For a fast calculation, use Remark 3 following Theorem 6.2.
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