SOLUTION: How many 3-letter passords can be made using the letters A thought Z if... a) Repetition of letters is allowed? b) Repetition of letters is not allowed?

Algebra ->  Test -> SOLUTION: How many 3-letter passords can be made using the letters A thought Z if... a) Repetition of letters is allowed? b) Repetition of letters is not allowed?      Log On


   

Question 1195700: How many 3-letter passords can be made using the letters A thought Z if...
a) Repetition of letters is allowed?
b) Repetition of letters is not allowed?
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.

(a)  26%5E3 = 17576.



(b)  26*25*24 = 15600.

Solved.