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Find the sum of all five digit numbers ,...

Find the sum of all five digit numbers ,that can be formed using the digits `1, 2, 3, 4 and 5` (repetition of digits not allowed)

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Required sum`=(5-1)!(1+2+3+4+5+((10^(5)-1)/(9))`
`=14*15*11111=39999960`
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