jvocare5827 jvocare5827
  • 17-06-2018
  • Mathematics
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What's the number of 6-charcter passwords made of lowercase letters where no two consecutive characters are the same?

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sqdancefan
sqdancefan sqdancefan
  • 17-06-2018
The first letter can be any of 26. Each remaining letter can be any of the 25 that remain after the one before is deleted from consideration. Your number is
  26·25^5 = 253,906,250
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