The nCr() Command

Command Summary

Performs the operation "n choose r" using n and r.

Command Syntax

nCr(expr1,expr2)

[Math][Probability][3]

This command works on all calculators.

This performs the operation "n choose r" where expr1 is n and expr2 is r.

:nCr(3,0)


# Formulas

The formula used to obtain the result is:

(1)
\begin{align} \frac{n!}{r!(n-r)!} \end{align}

This is often referenced with Pascal's Triangle and binomial expansion as well as many areas of mathematics.