SSC MTS 18 Oct 2021 Shift 1 Paper

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Question : 71 of 100
 
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A, B and C are boxes with marbles in the ratio 2 ∶ 3 ∶ 4. The total number of marbles in the boxes is 360. The above ratio can be changed to 3 ∶ 8 ∶ 7 by which of the following?
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