SOLUTION: You have 7 friends who want to go to a concert with you, but you only have 2 extra tickets who many possible ways are there to choose 2 of your 7 friends

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Question 437800: You have 7 friends who want to go to a concert with you, but you only have 2 extra tickets who many possible ways are there to choose 2 of your 7 friends
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

7 friends who want to go to a concert with you, 

but you only have 2 extra tickets

Number of ways to choose 2 of your 7 friends = 7C2 = 21 ways