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OpenStudy (anonymous):
/in a batch of 280 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.
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OpenStudy (anonymous):
4.2857%
OpenStudy (btaylor):
\[P(defective) = \frac{12}{280} \approx 4.29%\]
OpenStudy (anonymous):
Thank you I have such a hard time with probability give me a formula and i can figure it out
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