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04-10-2018
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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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Aidenfen Aidenfen

04-10-2018

6/60 parts are defects

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

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