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13 December, 18:34

How many different 4-digit sequences can be formed using the digits 0, 1, ..., 6 if repetition of digits is allowed

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  1. 13 December, 21:57
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    0 through 6 is 7 total numbers

    1st digit can be 0-6 = 7 numbers

    2nd digit can be 0-6 = 7 numbers

    3rd digit can be 0-6 = 7 numbers

    4th digit can be 0-6 = 7 numbers

    7 * 7 * 7 * 7 = 2401 different combinations
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