Thread: probability or statistics

I have a problem in math. It is: 6P6 . I don't know what P means! HELP!
Thanks
puppylove
need help ASAP!

nPr= n!/(n-r)!
So in your case 6P6=6!/(6-6)!=6!/0!=720/1=720
In case you are wondering n!=1*2*3*,...n
6!=6*5*4*3*2*1=720
0!=1
These are built in to most calculators.

How did you get (6-6)=6! ? I'm so confused!
puppylove

Originally Posted by puppylove

How did you get (6-6)=6! ?
puppylove

I didn't, the formula is

In your case

n=6
r=6

so

I think you missed the division sign & sorry I'm still new to LaTeX.