Question

3. How many different arrangements can be made with the letters in the word

POWER?
O A 100
B 25
OC 20
OD 120

Answer 1

D. 120

Explanation:

Array formula: A (n, p) = n! / (n -p)!

At where:

n = Total number of elements in the set.

p = Quantity of elements per arrangement

A (5.5) = 5! / (5-5)! = (5x4x3x2x1) / 0!

By definition: 0! = 1

Then: 120/1 = 120