Tuesday
March 31, 2015

Homework Help: math

Posted by raksha on Sunday, October 28, 2007 at 12:38am.

Suppose that the time (in hours) required to repair a machine is an exponentially distributed random variable with parameter λ (lambda) = 0.5.

What's the probability that a repair takes less than 5 hours? AND what's the conditional probability that a repair takes at least 11 hours, given that it takes more than 8 hours?

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