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Evaluate the combination:
8C2
A unique order or arrangement
nCr = | n! |
r!(n - r)! |
where n is the number of items
r is the unique arrangements.
8C2 2 | 8! |
2!(8 - 2)! |
n! = n * (n - 1) * (n - 2) * .... * 2 * 1
n! = 8!
8! = 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1
8! = 40,320
(n - r)! = (8 - 2)!
(8 - 2)! = 6!
6! = 6 x 5 x 4 x 3 x 2 x 1
6! = 720
r! = 2!
2! = 2 x 1
2! = 2
8C2 = | 40,320 |
2 x 720 |
8C2 = | 40,320 |
1,440 |