. . "'''C'''" . . . . "combination" . "⁷C₃" . "combinations" . "-element subsets of a set of elements" . . "''k''-combinations" . "^''n''C₂" . . "100 choose 50" . . . . "chosen" . "Expressed mathematically, the number of possible combinations" . "''k''-combination" . . "Combination" . . "Combinations" . . . . . . . . "regardless of the order" . "S. 2ⁿ−1" . "Combination" . . . "combined" . . . "Combination#Number of k-combinations" . "combinations without replacement" . . "choose" . . "Permutations and combinations" . "Combination#Number of combinations with repetition" .