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JEE MATHEMATICS MCQ: PERMUTATIONS

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Application +4 | -1

The sum of all four digit numbers that can be med using the digits

1,2,3,4

, when repetition of digits is not allowed, is

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Correct option: D

66660

Option D (66660) is correct because the sum is calculated by summing the digits, multiplying by (n-1)!, and then multiplying by (10^n - 1)/9.

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