SOLUTION: How many ways can an IRS auditor select a group of 8 tax returns from a group of 21 tax returns for an audit?

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Question 908101: How many ways can an IRS auditor select a group of 8 tax returns from a group of 21 tax returns for an audit?
Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
21C8 = 203490 ways