Question

Evaluate P(4, 4)

1
6
24

Answer 1

P(n,n)=n!

Answer 2

Not sure that i understand...

Answer 3

lol, an excited n

Answer 4

I suppose you no the factorial notation.

Answer 5

*know

Answer 6

One sec AFK

Answer 7

Okay.

Answer 8

Ugh. Sorry being on here is a minefield with my parents home >.<
So I do know what the ! means if that is what you mean by factorial notation

Answer 9

Okay for a given number n, n!=n(n-1)(n-2)....1

ie product of the terms upto n.

eg:
3!=3*2*1=6

Answer 10

Yes i am with you so far :)

Answer 11

But what does the comma between the two fours mean? Add?

Answer 12

Good. I believe you are doing a permutations questions. In it P(n,r) represent number of permutations of n objects taken r at a time.

Answer 13

Yes :D
And how do i go about solving this??

Answer 14

P(n,r)=n!/(n-r)!

Here n=r

P(n,n)=n!(n-n)!=n!/0!

0! is defined as one.

P(n,n)=n!

Plug in n=4

Answer 15

P(4,r)=4!/(4-r)!
Like that? ^^

Answer 16

and if n=r then i can plug in 4 for r also?

Answer 17

yes here r=4

Answer 18

ok then 4!/(4-4)! =24/1? So the answer is 24?? :D

Answer 19

Yes!! :D

Answer 20

Thanks @AravindG you are the best :P

Answer 21

I would fan you again but i already did ^.^

Answer 22

Haha yw :)