Solve the problem.
-How many 2-letter codes can be formed using the letters A, B, C, D, E, F, G, H, and I. Repeated letters are allowed.
A) 512
B) 72
C) 36
D) 81

Question

Quizplus · Accepted Answer

Since repeated letters are allowed, for each of the 2 positions in the code, there are 9 possible letters that can be chosen (A, B, C, D, E, F, G, H, I). Therefore, the total number of possible codes is 9 * 9 = 81.

Solve the Problem. -How Many 2-Letter Codes Can Be Formed Using the Letters