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9 May, 13:01

A box contains 10 transistors, 4 of which are defective. If 3 are sold at random, find the probability that exactly 1 are defective.

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  1. 9 May, 15:46
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    I'd say around 10%

    4 out of 10 = 40%

    3 out of the 10 are sold = 30%

    1 out of the 3 might be bad = 10%

    I may be wrong.
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