SOLUTION: a batch of 100 bulbs is known to have 5% defectives. if 10 bulbs are chosen at random, what is the probability that none of them will get defective? what is the probability that ex
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Question 687788: a batch of 100 bulbs is known to have 5% defectives. if 10 bulbs are chosen at random, what is the probability that none of them will get defective? what is the probability that exactly two defectives will be found?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a batch of 100 bulbs is known to have 5% defectives. if 10 bulbs are chosen at random, what is the probability that none of them will get defective? what is the probability that exactly two defectives will be found?
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5 bulbs are defective; 95 bulbs are not defective
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# of ways to select 2 defective: 5C2*95C8
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# of ways to select 2 randomly 100C10
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P(select 2 defective) = [5C2*95C8]/100C2 = 0.0702
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Cheers,
Stan H.
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