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elena-14-01-66 [18.8K]
3 years ago
12

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 mor

e than​ once?
Mathematics
1 answer:
posledela3 years ago
7 0
AA
AB
AC
BB
BC
CC


(That's 6)
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