Finite Math Examples

${}_{2}C_{4}$

Step 1

Evaluate ${}_{2}C_{4}$ using the formula ${}_{n}C_{r} = \frac{n!}{(n - r)! r!}$ .

$\frac{2!}{(2 - 4)! 4!}$

Step 2

Since $r > n$ , it is impossible to select $4$ items from a total of only $2$ possible items.

$0$