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Mathematics 13 Online
OpenStudy (anonymous):

The time between breakdowns of aging machines is known to be exponentially distributed with a mean of 50 hours. A specific machine has just been repaired. The probability that the next breakdown of that machine occurs more than 100 hours from now is equal to a. 0.02 b. 7.389 c. 0.0135 d. 1.3533 e. 0.1353

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