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Probability- Gravner- 80.c

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After your complaint about their service, a representative of an insurance company promised to call you "between $7$ and $9$ this evening." Assume that this means that the time $T$ of the call is uniformly distributed in the specified interval.

(c) Assume that you know in advance that the call will last exactly $1$ hour . From $9$ to $9.30$, there is a game show on TV that you wanted to watch. Let $M$ be the amount of time of the show that you miss because of th call. Compute the expected value of $M$.
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