There are 20 machines in a factory. 7 of the machines are defective.
Assuming you randomly choose one, place it back in the pile and randomly choose the
second one, what is the probability that both choices will be defective machines?
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Home » Mathematics » There are 20 machines in a factory. 7 of the machines are defective. Assuming you randomly choose one, place it back in the pile and randomly choose the second one, what is the probability that both choices will be defective machines?