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OpenStudy (anonymous):
At one factory, the ratio of defective light bulbs produced to total light bulbs produced is about 3:500. How many light bulbs are expected to be defective when 12,000 are produced?
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OpenStudy (anonymous):
P(defective)=3/500 if 12000 are produced, then you can expect 12000*(3/500)=72 to be defective
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