Evaluate the following permutation

10P6

Permutation Definition:

An order or arrangement

Permutation Formula:

nPr  =  n!
  (n - r)!

where n is the number of items
r is the number of arrangements.

Plug in n = 10 and r = 6

10P6  2  10!
  (10 - 6)!

Factorial Formula:

n! = n * (n - 1) * (n - 2) * .... * 2 * 1

Calculate n!:

n! = 10!

10! = 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

10! = 3,628,800

Calculate (n - r)!:

(n - r)! = (10 - 6)!

(10 - 6)! = 4!

4! = 4 x 3 x 2 x 1

4! = 24

Calculate 10P6:

10P6  =  3,628,800
  24

Final Answer


10P6 = 151,200