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Find the sum of all the 4 digit numbers that can be formed with the digits 3,2,3,4.

Ans- 39996

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No of 4 digit numbers formed=4!/2!=12

Now 2 and 4 will occur at units tens hundred and thousand place 3 times

3 will occur at each place 6 times

Sum of digits at units tens hundred and thousand place=3×2+3*4+6*3=36

Sum of all numbers=36×1000+36*100+36*10+36=39996
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