SOLUTION: You have 7 old books and need to choose 4 to give away. How many different groups of 4 books can you make?

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Question 463999: You have 7 old books and need to choose 4 to give away. How many different groups of 4 books can you make?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
nCr=Combination of n things taken r at a time=n!/((n-r)!*r!)
7C4=35
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Ed