App Description

Combination formula

<img src="http://drr.ikcest.org/static/upload/ed/edb24eec-e972-11e9-9491-00163e0618d6_m.jpg" />

Usage example

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

<img src="http://drr.ikcest.org/static/upload/35/35c44c3a-e973-11e9-bab5-00163e0618d6_m.jpg" />

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)