App Description

Combination formula

Usage example

Combination number calculator for C(n,r) Input data: input n = 7; input r = 4

Note

Symbol Description: C-combination number, total number of n-elements, r-number of elements participating in the selection, !-factorial, such as 5! =5 * 4 * 3 * 2 * 1=120 C-Combination Combination P-Permutation arrangement (now textbook A-Arrangement)

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