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If one-third of A, one-fourth of B and one-fifth of C are equal, then A : B : C is?

3 : 4 : 5
4 : 3 : 5
5 : 4 : 3
1/3 : 1/4 :1/5

Correct Answer: 3 : 4 : 5

Explanation:

∵ 1/3 A = 1/4, B = 1/5, C = x
Then, A = 3x, B = 4x and C = 5x
∴ A : B : C = 3x : 4x : 5x = 3 : 4 : 5

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