SOLUTION: A sample of 4 different calculators is randomly selected from a group containing 19 that are defective and 36 that have no defects. What is the probability that at least one of the
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Question 1025121: A sample of 4 different calculators is randomly selected from a group containing 19 that are defective and 36 that have no defects. What is the probability that at least one of the four calculators is defective? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A sample of 4 different calculators is randomly selected from a group containing 19 that are defective and 36 that have no defects. What is the probability that at least one of the four calculators is defective?
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P(at least one defective) = 1 - P(no defectives)
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# of ways to get 4 non-defective:: 36C4
# of random sets of 4:: 55C4
P(>=1) = 1 - (36C4)/(55C4) = 1 - 0.0169 = 0.9831
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Cheers,
Stan H.
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