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  • 10-10-2017
  • Mathematics
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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?

Respuesta :

cmerkle8236
cmerkle8236 cmerkle8236
  • 10-10-2017
AA
AB
AC
BB
BC
CC


(That's 6)
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