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      Question

      140 litres of mixture contains water and milk in the

      ratio 3:7 respectively. If 40 litres of the mixture is replaced by same quantity of water, then find the ratio of water and milk in the final mixture.
      A 3:1 Correct Answer Incorrect Answer
      B 2:3 Correct Answer Incorrect Answer
      C 3:2 Correct Answer Incorrect Answer
      D 1:1 Correct Answer Incorrect Answer
      E 4:1 Correct Answer Incorrect Answer

      Solution

      Remaining quantity of the original mixture = 140 – 40 = 100 litres Quantity of water in the final mixture = 100 x (3/10) + 40 = 70 litres Quantity of milk in the final mixture = 100 x (7/10) = 70 litres Ratio of water and milk in the final mixture = 70 : 70 = 1:1

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