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March 29, 2017

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How many three digit numbers have three distinct digits?

  • Geometry - ,

    1st digit: 9 choices
    2nd digit: 9 choices
    3rd digit: 8 choices
    so, 9*9*8

  • Geometry - ,

    Actually not because the problem is asking for 3 digits such as 100

  • Geometry - ,

    Sorry made a mistake you are right

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