Question

Abdul is choosing a 3 letter password from the letters A,B,C,D, and E. The password cannot have the same letter repeated in it. How many such passwords are possible?

Answer 1

There are 60 unique passwords. You can find this answer by multiplying 5*4*3 because each time you will have one less letter to choose from.

Answer 2

there are 5 letters

1st letter can be any 5

2nd letter can be any 5 -1 = 4

3rd letter can be any 5 -2 = 3

5*4*3 = 60 different combinations