Section: Math Section 3
58)
A test shows that 10 out of 100 gadgets are defective. In a random sample of two gadgets are chosen, the probability that both are defective it is:
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Explanation
The probability that the first gadget is defective is 10/100, and the probability that the second gadget is defective is 9/99. To solve this you must multiply the two fractions.
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