Question: The time between telephone calls at a telephone switch is the exponential random variable T with expected value 0.01. (a) What is E[TIT > 0.02],

The time between telephone calls at a telephone switch is the exponential random variable T with expected value 0.01.
(a) What is E[TIT > 0.02], the conditional expected value of T?
(b) What is Var[TIT > 0.02], the conditional variance of T?

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