4. Length (in minutes) of a long-distance telephone conversation is exponentially distributed with a mean of 10 minutes.

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4. Length (in minutes) of a long-distance telephone conversation is exponentially distributed with a mean of 10 minutes.

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4 Length In Minutes Of A Long Distance Telephone Conversation Is Exponentially Distributed With A Mean Of 10 Minutes 1
4 Length In Minutes Of A Long Distance Telephone Conversation Is Exponentially Distributed With A Mean Of 10 Minutes 1 (16.99 KiB) Viewed 77 times
4. Length (in minutes) of a long-distance telephone conversation is exponentially distributed with a mean of 10 minutes. If a telephone company customer makes 100 long-distance calls a year, approximate the probability that at least half of them will be in length of more than 10 minutes.
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