SOLUTION: A package contains 10 pens, three of which are defective. If two pens are selected at random, find the probability of getting one defective pen?
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Question 422407: A package contains 10 pens, three of which are defective. If two pens are selected at random, find the probability of getting one defective pen? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A package contains 10 pens, three of which are defective. If two pens are selected at random, find the probability of getting one defective pen?
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P(defective) = 3/10
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P(not-defective) = 7/10
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Binomial Problem with n = 2 and p = 0.3
P(x = 1) = 2C1(0.3)(0.7) = 2*0.21 = 0.42
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Cheers,
Stan H.
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