Question 942850: what is the formula for permutation in algebra 1
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! the permutation of n things taken x at a time is equal to n! / (n-x)!
for example:
if n = 3 and x = 2, then the permutation of 3 things taken 2 at a time is equal to 3! / 1! which is equal to 3! which is equal to 3*2 = 6.
if n = 3 and x = 1, then the permutation of 3 things taken 1 at a time is equal to 3! / 2! which is equal to 3.
the permutation of n things taken n at a time is always n!.
for example:
if n = 3 and x = 3, then the permutation of 3 things taken 3 at a time is equal to 3! / 0! which is equal to 3!.
0! is always equal to 1.
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