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April 20, 2014

Homework Help: statistics

Posted by marlynn on Thursday, October 20, 2011 at 12:29pm.

a batch of 25 used automobile alternators contains 3 defectives. if 3 alternators are sampled at random, find the probability of the event .

(a). A=[none of the defectives appear ]
(b). B=[exactly two defectives appear]

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