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      Question

      150 ml of mixture A containing milk and water in the

      ratio of 7:3 respectively is mixed with another 150 ml of mixture B containing milk and water in the ratio of 1:4 respectively. Find the ratio of milk to water in the resultant mixture.
      A 9:11 Correct Answer Incorrect Answer
      B 11:9 Correct Answer Incorrect Answer
      C 3:2 Correct Answer Incorrect Answer
      D 2:3 Correct Answer Incorrect Answer
      E 5:6 Correct Answer Incorrect Answer

      Solution

      Quantity of milk in 150 ml of mixture A = 7/10 × 150 = 105 ml
      Quantity of water in 150 ml of mixture A = 3/10 × 150 = 45 ml
      Quantity of milk in 150 ml of mixture B = 1/5 × 150 = 30 ml
      Quantity of water in 150 ml of mixture B = 4/5 × 150 = 120 ml
      Desired Ratio = (105 + 30):(45 + 120) = 135:165 = 9:11

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