SOLUTION: Justin can invite 2 of his 6 friends to go to the football game with him. How many combinations of 2 friends can Justin take to the game?

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Question 576262: Justin can invite 2 of his 6 friends to go to the football game with him. How many combinations of 2 friends can Justin take to the game?
Answer by chana(69) About Me  (Show Source):
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Justin can invite 2 of his 6 friends to go to the football game with him. How many combinations of 2 friends can Justin take to the game?
sol :
2 ppl from 6
so 6c2 = 15 ways