What+is+permutation?

- a permutation is an arrangement or listing in which order is important -the symbol P(x,x) represents the number of permutations of x things taken x at a time.

-Example...

How many ways can six swimmers be arranged on a four person relay team -on a relay team, the order of the swimmers is important, this arrangement is a permutation. -6 swimmers P(6,4) = 6*5*4*3 - 6 choices for 1st person -choose 4 =360 - 5 choices for 2nd person - 4 choices for 3rd person - 3 choices for 4th person - there are 360 possible arrangements!!