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A special type of password consists of four different letters of the alphabet, where each letter is used only once. How many different possible passwords are there?

5 answers

8 different passwords were formed:
ABCD
BCD
CDAB
DABC.

DCBA
CBAD
BADC
ADCB

CORRECTION:BCD should be BCDA

6! - (50%4) =

Azxcvy

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