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      Question

      A mixture contains 100 ml of milk and 25 ml of water.

      If 25 ml of the mixture is replaced with 15 ml of water, then find the ratio of quantity of milk to that of water in the resultant mixture.
      A 16:7 Correct Answer Incorrect Answer
      B 4:3 Correct Answer Incorrect Answer
      C 5:2 Correct Answer Incorrect Answer
      D 3:1 Correct Answer Incorrect Answer

      Solution

      Initial ratio of quantity of milk to that of water = 100:25 = 4:1 Quantity of milk withdrawn = 25 × (4/5) = 20 ml Final quantity of milk = 100 – 20 = 80 ml Quantity of water withdrawn = 25 × (1/5) = 5 ml Final quantity of water = 25 – 5 + 15 = 35 ml Required ratio = 80:35 = 16:7

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