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College Mathematics

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Counting principles and permutations. A social security number consists of 9 digits. How many different social security numbers are possible if repetition of digits is permitted. digits 0-9

  • College Mathematics - ,

    I answered this question for you 20 minutes before you reposted it
    http://www.jiskha.com/display.cgi?id=1363627561

    What part of my answer did you not understand ?

  • College Mathematics - ,

    it said 9 digits 0-9

  • College Mathematics - ,

    Does this look right if it is 0-9
    26*26*10*10*10*10=6,760,000

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