Combination with Replacement Calculator

Combination Replacement Calculator

Will calculate the combinations with replacement for C^R(n,r) = C(n+r-1,r) = (n+r-1)! / r! (n - 1)!. For r <= n, n >= 0, and r >= 0.

Find the Combinations:
C(n,r) where:
n =
r =

C^R(1,1) = (1+1-1)! / 1! (1 - 1)! =
1

Combination with Replacement Formula:

C^R(n,r) = C(n+r-1,r) = (n+r-1)! / r! (n - 1)!.

For more information on combinations and binomial coefficients please see http://mathworld.wolfram.com/Combination.html