Enter n

Enter r

  

Answer
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5P5 = 120

↓Steps Explained:↓

Evaluate the following permutation

5P5

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 = 5 and r = 5

5P5  2  5!
  (5 - 5)!

Factorial Formula:

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

Calculate n!:

n! = 5!

Calculate (n - r)!:

(n - r)! = (5 - 5)!

(5 - 5)! = 0!

Calculate 5P5:

5P5  =  5 x 4 x 3 x 2 x 1 x 0!
  0!

5P5  =  5 x 4 x 3 x 2 x 1 x 0!
  0!

5P5 = 5 x 4 x 3 x 2 x 1

Final Answer

5P5 = 120
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