Question 311011: How many ways can 15 girls be chosen to form a baseball team of 9 players?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! How many ways can 15 girls be chosen to form a baseball team of 9 players?
----------------
The 1st is 1 of 15, then 1 of 14, 13, 12... etc
= 15*14*13*12*11*10*9*8*7
But, because choosing girls A,B,C,D... gives the same result as choosing
D,C,A,B... it's necessary to divide by 9*8*7*6*5*4*3*2*1, or 9!
-------------
The result is 15!/((15-9)!*9!)
= 5005 combinations
|
|
|
