The nCr() Command
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)\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.