Using the letters A and B, the following two-letter code words can be formed: AA, AB, BB,Ba. Using the letters A, B, and C, how many different three-letter code words can be formed?

Question

I know that the answer is 27 from the answer sheet, but how? Can you please list the combinations? Thanks!

Answer 1

Yes, but can you list the combinations?

I'll get you started.

AAA
AAB
ABA
ABB
ABC
ACB
ACC
ACA
AAC

Answer 2

3*3*3