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Multiple choice

In what ratio must 25% of alcohol be mixed with 50% of alcohol to get a mixture of 40% strength alcohol?

  1. 1 : 2

  2. 2 : 1

  3. 2 : 3

  4. 3 : 2

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using allegation method: 25% and 50% alcohols mix to give 40%. Differences: 50 - 40 = 10, 40 - 25 = 15. Ratio of 25% : 50% = 10 : 15 = 2 : 3. Option C matches.

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