What is _6P_2?

Question

I think I phrased this correctly, but if not...
A lowered small 6 before a capital P after the P is another lower small 2. I need help setting up these types of problems and answering them as well. Thanks for any help.

Is there a better way to enter this problem on the computer?

Answer 1

nPr = n!/(n-r)! (It can also be written with subscripts, so _6P_2 is fine, at least for me, since I can type in LaTeX.)

6P2 = 6!/(6-2)! = 6!/4! = (6*5*4)!/4! = 6*5 = 30

You can do this in Excel using PERMUT(number,number_chosen), so here, you would type

=PERMUT(6,2)

in a cell to get an answer.

Answer 2

The p stands for permutation. 6p2 means that if you had 6 objects and you were picking 2 of them, how many different ways could you do this. The answer in this case is 6*5=30. If you had 6p3 the answer would be 6*5*4=120.

Answer 3

that is 6 permutationof 2

this can be written as

6! / (6-2)!

or six factorial over four factorial