# Why is order important in permutations?

##### 1 Answer
Apr 14, 2015

It is important in permutations by the definition of the word "permutation". If we ignore order, then we are discussing / choosing "combinations".

Given set $\left\{a , b , c , d\right\}$, if we count $a b$ and $b a$ as the same, then we are counting combinations.
If they are counted as different, then we are counting permutation.