SOLUTION: The letters a, b, c, and d will be used to form passwords for the schools computer system. How many 4 letter passwords maybe formed if the letters can be used more than once in any

Algebra ->  Probability-and-statistics -> SOLUTION: The letters a, b, c, and d will be used to form passwords for the schools computer system. How many 4 letter passwords maybe formed if the letters can be used more than once in any      Log On


   

Question 15710: The letters a, b, c, and d will be used to form passwords for the schools computer system. How many 4 letter passwords maybe formed if the letters can be used more than once in any passwrd?
Answer by cassiroberts(11) About Me  (Show Source):
You can put this solution on YOUR website!
there can be 20 four letters passwords formed