4.17 Among five portable generators produced by an assembly line in one day, there are two defectives.
Question:
4.17 Among five portable generators produced by an assembly line in one day, there are two defectives.
If two generators are selected for sale, find the probability that both will be nondefective.
(Assume the two selected for sale are chosen so that every possible sample of size two has the same probability of being selected.)
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Related Book For 
Probability And Statistics For Engineers
ISBN: 9781133006909
5th Edition
Authors: Richard L Scheaffer, Madhuri Mulekar, James T McClave, Cecie Starr
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