Discrete Math

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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?

  • Discrete Math -

    8 different passwords were formed:
    ABCD
    BCD
    CDAB
    DABC.

    DCBA
    CBAD
    BADC
    ADCB

  • Discrete Math -

    CORRECTION:BCD should be BCDA

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