SOLUTION: A baseball manager has 11 players of the same ability. How many 9 players starting lineups can he create

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Question 1109283: A baseball manager has 11 players of the same ability. How many 9 players starting lineups can he create
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
That is 11C9 or 11!/9!2!
That is 11*10/2=55
11!=11*10*9!
11!/9! is therefore 11*10
That is divided by 2