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Ajit is 3 times as efficient as Bablu, then the ratio of number of days required by each to work alone, completely?

3 : 1
1 : 3
6 : 3
3 : 6

Correct Answer: 1 : 3

Explanation:

Efficiency of Ajit : Bablu = 3 : 1
No. of days 1 : 3

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