SOLUTION: How many two-letter codes can be formed using the letters A, B, C, and D? Repeated letters are allowed.

Algebra ->  Permutations -> SOLUTION: How many two-letter codes can be formed using the letters A, B, C, and D? Repeated letters are allowed.      Log On


   

Question 1132037: How many two-letter codes can be formed using the letters A, B, C, and D? Repeated letters are allowed.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
With repeated, there are 4 ways to choose the first and 4 ways to choose the second. That means 16 possibilities.