## Algebra 1: Common Core (15th Edition)

No, it is not possible. $C(n,r)$ is defined as $\frac{n!}{r!(n-r)!}$. If we do a combination where $n < r$ $n-r$ will be negative, and factorials are only defined for nonnegative integers.
No, it is not possible. $C(n,r)$ is defined as $\frac{n!}{r!(n-r)!}$. If we do a combination where $n < r$ $n-r$ will be negative, and factorials are only defined for nonnegative integers.