## Algebra 2 Common Core

A $permutation$ is where the order is important, whereas in a $combination$ the order does not matter.
Within a $Permutation$, the order of selection matters. For example, placings in a competition where competitors are getting $1^{st}$, $2^{nd}$ and $3^{rd}$ is a permutation as the order in which the competitors finish is important and changes the placings. Within a $Combination$, the order does not matter. For example, the possible numbers rolled on three dice. Rolling a $1$, $2$, $3$, is the same outcome as rolling $2$, $1$, $3$.