SOLUTION: An IRS auditor randomly selects 3 tax returns (without replacement) from 47 returns of which 5 contain errors. What is the probability that she selects none of those containing er
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Question 245802: An IRS auditor randomly selects 3 tax returns (without replacement) from 47 returns of which 5 contain errors. What is the probability that she selects none of those containing errors?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nCr = n!/((n-r)!r!) Combinations of n things taken r at a time.
42C3/47C3
=11480/16215
=.708 probability she selects none.
.
Ed
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