What is the probability that a bulb purchased at random

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Reference no: EM13266802

Time to failure in months, X
Fx(x) = (1 - e ^(-x/5))u(x) for plant A
Fx(x) = (1 - e ^(-x/2))u(x) for plant B
Plant B produces three times as much as plant A.
What is the probability that a bulb purchased at random will burn at least (a) two months, (b) five months and (c) seven months

Reference no: EM13266802

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