Ratio of volumes of 3 containers is 3 : 4 : 5. All the three containers are full of a mixture of milk and water. Ratio of milk and water is 4 : 1, 3 : 1 and 3 : 2 in the three containers respectively. If the liquid of all the three containers is poured in the 4th container, then find the ratio of milk and water.

  1. A. 1 : 2
  2. B. 2 : 3
  3. C. 7 : 3 ✓
  4. D. 5 : 4

Correct Answer: C. 7 : 3

Explanation

Let volumes be 30, 40, 50. Milk in them = \frac{4}{5} \times 30 + \frac{3}{4} \times 40 + \frac{3}{5} \times 50 = 24 + 30 + 30 = 84. Water = 6 + 10 + 20 = 36. Ratio = 84:36 = 7:3.

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