RCombination.md (243B)
1 # r-Combination 2 3 Ch 6.3 4 5 **Definition:** An r-Combination is a combination of length r. 6 7 The function to denote r-combinations of a set length n is C(r,n). There are other ways to state it, but I prefer this. 8 9 $C(r,n) = \frac{n!}{r!(n-r)!}$