SOLUTION: A women's lacrosse team is holding tryouts. The coach has decided that he will keep 20 players from tryouts for his team. If 23 women try out for the team, how many different ways

Algebra ->  Permutations -> SOLUTION: A women's lacrosse team is holding tryouts. The coach has decided that he will keep 20 players from tryouts for his team. If 23 women try out for the team, how many different ways       Log On


   



Question 1151324: A women's lacrosse team is holding tryouts. The coach has decided that he will keep 20 players from tryouts for his team. If 23 women try out for the team, how many different ways can the 20-player team be formed?
Answer by greenestamps(13198) About Me  (Show Source):
You can put this solution on YOUR website!


Literally, "23 choose 20".

Use a calculator if necessary; many good calculators (like the TI83) have functions built in to calculate "n choose r" numbers.

To do the calculation manually, note that 23 choose 20 is the same as 23 choose 3 (the coach is choosing 3 of the 23 to NOT be on the team). Then the calculation is

%2823%2A22%2A21%29%2F%283%2A2%2A1%29+=+23%2A11%2A7+=+1771