Question

Evaluate 9P4. Please I Need a good grade! Thanks

Answer 1

Answer:

9P4 = 3024

Step-by-step explanation:

We have to find the value of 9P4.

We know the formula for permutation which is given by

$^nP_r=\frac{n!}{(n-r)!}$

We have,

n = 9

r = 4

On plugging these values in the above formula, we get

$^9P_4=\frac{9!}{(9-4)!}$

$^9P_4=\frac{9!}{5!}$

$^9P_4=\frac{5!\times 6\times 7\times 8\times 9}{5)!}$

$^9P_4= 6\times 7\times 8\times 9$

$^9P_4=3024$

Answer 2

Hello!

₉P₄ means the number of permutations of 9 objects chosen 4 at a time. 
This is 9! / (9-4)! = 362,880 / 120 = 3024.

nPr = n!/(n-r)! 
nCr = n!/(n-r)!r! 

So as said, in this case its 9P4=9!\5!=9*8*7*6=3024


Hope this Helps! Have A Wonderful Day! :)