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JEE MATHEMATICS MCQ: PERMUTATIONS

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Sum of digits in the unit’s place formed by the digits 1, 2, 3 and 4 taken all at a time is

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Correct option: B

60

Option B (60) is correct because each digit appears in the unit's place

3!

times, and the sum of the digits is

1+2+3+4=10

, so the sum of digits in the unit's place is

3! \times 10 = 60

.

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