Multiple choice

In what ratio must a 25% sugar solution be mixed with a 50% sugar solution to get a 40% sugar solution?

  1. 3 : 2

  2. 4 : 5

  3. 2 : 3

  4. 7 : 9

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using alligation: (50-40) / (40-25) = 10 / 15 = 2 / 3.

AI explanation

Using the rule of alligation for the 25% and 50% sugar solutions against the target 40% concentration, we write the differences: (50 minus 40) to (40 minus 25). This simplifies to 10 to 15, which reduces to a ratio of 2 to 3.

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