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Using three of the letters of the​ alphabet, how many two​-letter codes can we form if we are allowed to use the same letter more than​ once?
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3 votes
Using three of the letters of the​ alphabet, how many two​-letter codes can we form if we are allowed to use the same letter more than​ once?

User Colmulhall
by
8.8k points

1 Answer

2 votes
AA
AB
AC
BB
BC
CC


(That's 6)
User Irv
by
7.2k points
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