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
1 answer:
Batch size = 280 purifiers
Defectives = 12 purifiers
Then,
P(defective) = defectives/batch size = 12/280 =3/70
As a percentage:
P(defective) = (3/70)*100 = 4.29%
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