anyways back to math....

Now i am sure this is going to be somewhat similar to what others have posted so please bare with me as i will try and find some new stuff on permutations!

A

**Permutation**is the rearrangement of objects or symbols into distinguishable sequences. Each unique ordering is called a permutation.

as defined by the most helpful Wikipedia.

One person who played a major role in developing permutations was am man by the name of Augustin Louis Cauchy. He wrote a number of papers on the subject and this all happened around the year 1844.

Now the main formula for permutations is

--------->

**nPr**<--------- n=is the number of digits you have to choose from

**and**

r=is the number of digits being used at a time (what you want)

....and if all of that mumbo jumbo didn't make sense to you, then here is an example which will hopefully help you out!

**Question: >>>**In how many ways can 8 CD’s be arranged on a shelf?

**<<<**

**Answer:**First you must plug the numbers into the formula.

It would then look like 8P8.

After that you just have to do the multiplication which is

**8*7*6*5*4*3*2*1= 40320**

So there are 40320 ways to arrange that 8 CD's on the shelf. Wow that is a lot!

I am hoping that this scribe has helped you all understand permutations better. I know it helped me.

## No comments:

Post a Comment