(nC\_{r} +^{n} ⥂ C\_{r - 1}) is equal to. | MATH - DEFINITON OF COMBINATIONS, CONDITION COMBINATIONS, DIVISION INTO GROUPS, DERANGEMENTS | SolveeIt | Solveeit

Today, August 18

Question

$nC_{r} +^{n} ⥂ C_{r - 1}$ is equal to.

A

$n + 1C_{r}$

B

$nC_{r + 1}$

C

$n + 1C_{r + 1}$

D

$n - 1C_{r - 1}$

Answer

$n + 1C_{r}$

Explanation

Solution

It is a fundamental property