Multiple choice

Two barrels contain a mixture of milk and water. The content of the milk is 60% in the first barrel and 30% in the second barrel. In what ratio must the mixtures from the first and second barrels be taken to form a mixture containing 50% milk?

  1. 2:1

  2. 2:5

  3. 1:3

  4. 3:2

  5. 4:5
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A Correct answer
Explanation

This is an alligation problem. To find the ratio, use the alligation method: (60-50):(50-30) = 10:20 = 1:2. This means we need 2 parts of the 60% mixture and 1 part of the 30% mixture. The final ratio is 2:1 (first barrel:second barrel).

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