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

nCr(*expr1,expr2*)

**Menu Location**

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

# Related Commands

Several (around 3) commands have a similar function or are used in a similar context to this command. Make a bulleted list of them, with links to the other commands' pages. It will often be the case that several commands all link to each other.