SOLUTION: An IRS auditor randomly selects 2 different tax returns from 45 of which 15 contain errors. What is the probability that she selects none of those containing errors?
Answer? : 3
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Answer? : 3
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Question 802162: An IRS auditor randomly selects 2 different tax returns from 45 of which 15 contain errors. What is the probability that she selects none of those containing errors?
Answer? : 30/45 * 29/44 = .4393 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! An IRS auditor randomly selects 2 different tax returns from 45 of which 15 contain errors. What is the probability that she selects none of those containing errors?
Answer? : 30/45 * 29/44 = .4393
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# of ways to succeed::: 30C2 = (30*29)/(1*2) = 435
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# of possible pairs::: 45C2 = (45*44)/(1*2) = 990
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P(select 2 without errors) = 435/990 = 0.4394
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Cheers,
Stan H.
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