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      Question

      Three containers have their volumes in the ratio 3: 4:

      5, They are full of mixtures of milk and water. The mixtures contain milk and water in the ratio of (4: 1), (3: 1) and (5: 2)respectively. The contents of all these three containers are poured into a fourth container.The ratio of milk and water in the fourth container is :
      A 551:48 Correct Answer Incorrect Answer
      B 157:53 Correct Answer Incorrect Answer
      C 4:1 Correct Answer Incorrect Answer
      D 5:2 Correct Answer Incorrect Answer

      Solution

      Let the volumes be 3x,4x,5x respectively.

      Container with volume 3x,

      Milk = [4/(4+1)] × 3x

      Water = [1/(4+1)] × 3x

      Container with volume 4x,

      Milk = [3/(3+1)] × 4x

      Water = [1/(3+1)] × 4x

      Container with volume 5x,

      Milk = [5/(5+2)] × 5x

      Water = [2/(5+2)] × 5x

      Total milk = 12x/5 + 12x/4 + 25x/7 = 1256x/140

      ​Total water = 3x/4 + 4x/4 + 10x/7 = 424x/140

      Ratio of milk to water in 4th container = 1256/424 =157:53

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