SOLUTION: A sample of 4 different calculators is randomly selected from a group containing 47 that are defective and 20 that have no defects. What is the probability that all four of the cal

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Question 960916: A sample of 4 different calculators is randomly selected from a group containing 47 that are defective and 20 that have no defects. What is the probability that all four of the calculators seleced are defective? Round your answer to four decimal places. (this is an implied without replacement.)
Answer by stanbon(75887) About Me  (Show Source):
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A sample of 4 different calculators is randomly selected from a group containing 47 that are defective and 20 that have no defects. What is the probability that all four of the calculators seleced are defective? Round your answer to four decimal places. (this is an implied without replacement.)
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# of ways to pick 4 defective:: 47C4
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# of possible outcomes in selecting 4:: 67C4
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Ans: P(4 defective) = 47C4/67C4 = 0.2327
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Cheers,
Stan H.
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