Multiple choice

Two vessels are full of milk with milk water ratio $1 : 3$ and $3 : 5$ respectively. If both are mixed in the ratio $3 : 2$, what is the ratio of milk and water in the new mixture?

  1. $4 : 15$
  2. $3 : 7$
  3. $6 : 7$
  4. None of the above

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D Correct answer
AI explanation

Using the method of alligation for the milk concentrations, the first vessel has a milk fraction of 1 divided by 4 and the second has a milk fraction of 3 divided by 8. The alligation ratio is (3 divided by 8 minus 5 divided by 14) divided by (5 divided by 14 minus 1 divided by 4), which equals 2 to 3 and does not match the given 3 to 2 mixing ratio. Applying the actual 3 to 2 volumes, the milk becomes (3 times 1/4) plus (2 times 3/8), totaling 15 divided by 8, and the water becomes (3 times 3/4) plus (2 times 5/8), totaling 19 divided by 8. This gives a final milk to water ratio of 15 to 19, which is not listed among the options.