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      Question

      600 ml of mixture contains milk and water in the ratio

      of 3:2. If `x` ml of milk and `(x - 40)` ml of water are added, then the ratio becomes 7:5. Find the value of `x`.
      A 160 Correct Answer Incorrect Answer
      B 180 Correct Answer Incorrect Answer
      C 200 Correct Answer Incorrect Answer
      D 220 Correct Answer Incorrect Answer

      Solution

      Milk = (3/5) × 600 = 360 ml
      Water = (2/5) × 600 = 240 ml
      (360 + x)/(240 + x - 40) = 7/5
      5(360 + x) = 7(200 + x)
      1800 + 5x = 1400 + 7x
      2x = 400
      ⇒ x = 200

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