SOLUTION: A lot of portable radios contain 15 good radios and 3 defective ones. If two are selected and tested, find the probability that at least one will be defective.
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Question 581792: A lot of portable radios contain 15 good radios and 3 defective ones. If two are selected and tested, find the probability that at least one will be defective. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A lot of portable radios contain 15 good radios and 3 defective ones. If two are selected and tested, find the probability that at least one will be defective.
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Binomial with p(defective) = 3/18 and p(good) = 15/18
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P(>= 1 defective) = 1 - P(none defective)
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= 1 - (15/18)^2
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= 0.3056
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Cheers,
Stan H.
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