Question

Jason wants to choose 9 players for his track team. There are 12 players to choose from. How many different teams can Jason make?

Answer 1

12 choose 9

\[\left(\begin{matrix}12 \\ 9\end{matrix}\right)\]

Answer 2

12 times 9?

Answer 3

No you use this:

http://en.wikipedia.org/wiki/Combination

Answer 4

?

Answer 5

Have you taken computations and permutations?

Answer 6

no

Answer 7

108

Answer 8

9 times 12

Answer 9

use the combination formula :
nCr = n!/(n-r)!r!

with n = 12 and r = 9