factorials

(a b) ----> a! / (b! * (a-b)! )

(11 4) ---> 11! / (4! * (7)! ) = 330

(5 2) ---> 5! / (2! * (3)! ) = 10

(3 1) ---> 3! / (1! * (2)! ) = 3

tjloveley1:

evaluate the expression.
(11 4) (5 2) (3 1)

calc:

(a b) ----> a! / (b! * (a-b)! )

nice.

[input]ncr( 11, 4)[/input]
[input]ncr( 5, 2)[/input]
[input]ncr( 3, 1)[/input]