February 24, 2017

Homework Help: Probability and statistics

Posted by Arun on Thursday, March 1, 2012 at 12:30am.

The probability that the life time of randomly chosen device is below average, average,above average are respectively 0.2,0.5,0.3. The probability that of the 3 randomly chosen devices lifetimes of 2 are above average and 1 below average equals


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