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A batch of 60 parts contains six defects. If two parts are drawn randomly one at a time without replacement, what is the probability that both parts are defective?
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4 votes
A batch of 60 parts contains six defects. If two parts are drawn randomly one at a time without replacement, what is the probability that both parts are defective?

User Radu Vlad
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1 Answer

5 votes
6/60 parts are defects

The probability that both parts are defective are
(6/60)•(5/59)=30/3540 or 1/118
User Hisham Khalil
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