Evaluate the combination:
11C4
A unique order or arrangement
nCr = | n! |
r!(n - r)! |
where n is the number of items
r is the unique arrangements.
11C4 2 | 11! |
4!(11 - 4)! |
n! = n * (n - 1) * (n - 2) * .... * 2 * 1
n! = 11!
11! = 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1
11! = 39,916,800
(n - r)! = (11 - 4)!
(11 - 4)! = 7!
7! = 7 x 6 x 5 x 4 x 3 x 2 x 1
7! = 5,040
r! = 4!
4! = 4 x 3 x 2 x 1
4! = 24
11C4 = | 39,916,800 |
24 x 5,040 |
11C4 = | 39,916,800 |
120,960 |