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OpenStudy (anonymous):
in a batch of 390 water purifiers, 12 were found to be defective. what is the probability that a water purifier chosen at random will be defective? write the probability as a percent. round to the nearest tenth of a percent if necessary.
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OpenStudy (anonymous):
12 / 390
OpenStudy (helpsos):
12 / 390 * 100 = 3.1
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