SOLUTION: You want to choose 2 friends among your total 81 friends. You many ways can you do that?

Question 854716: You want to choose 2 friends among your total 81 friends. You many ways can you do that?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

81C2 = 3240 ways =  

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