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3.9 Suppose r.v. X has the exponential pdf f(x) = A exp[-. x], for x >...

3.9 Suppose r.v. X has the exponential pdf f(x) = A exp[-. x], for x > 0. and f(x) = 0. for x ? 0.

Find Pr(x > a + b l x > a) given a, b > 0.

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