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16 October, 02:31

How many five digit numbers can be formed using digits 0-6 if repetitions are not allowed?

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  1. 16 October, 02:38
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    6 choices for 1st digit

    5 choices for 2nd digit (since we used 1 for 1st slot already)

    4 for 3rd

    3 for 4th

    2 for 5th

    so the number of numbers is 6*5*4*3*2=720 different numbers
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