The life length Y of a component used in a complex electronic system is known to have an exponential density with a mean of 150 hours. The component is replaced at failure or at age 200 hours, whichever comes first. (a) Find the distribution function for X, the length of time the component is in use. F(x) = " x < 0 0 ≤ x < 200 x ≥ 200 (b) Find E(X). (Round your answer to two decimal places.) E(X) = hours

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