Question

Evaluate P(6, 2).



12
30
360

Answer 1

Is that the full question ?

Answer 2

yes

Answer 3

Is it about polynomials ?

Answer 4

no Permutations

Answer 5

Do you know what factorials are ?

Answer 6

what

Answer 7

GO @Eyad !!!

Answer 8

@Shannon20150 he meant what is meant by factorial of a number.

I mean, what would you understand by 4 factorial

Answer 9

\[\Large P(6,2) = {6! \over (6 - 2)!}\]
Is it like that ?

Answer 10

?

Answer 11

@Eyad yeah i think its that.

Answer 12

30

Answer 13

you have six items and you want to know how many ways you can order two of them
counting principle tells you it is \(6\times 5\) i.e. six choices for the first one and then five for the second

Answer 14

oh thanks @satellite73

Answer 15

\[\Huge \color{Red}{OR}\]

\[\Large P(6,2) = {6! \over (6 - 2)!} \]
\[\Large P(6,2) = {6*(6-1)! \over (6 - 2)!}\]
\[\Large P(6,2) = {6*(6-1)*(6-2)! \over (6 - 2)!}\]
Cancel the (6-2)!
6*(6-1)=30
----
Cheer !