Quantitative Aptitude – Mixture – Two alcohol solutions, A and B, are mixed in the proportion


Slot – 3 – Quantitative Aptitude – Mixture – Two alcohol solutions, A and B, are mixed in the proportion


Q. Two alcohol solutions, A and B, are mixed in the proportion 1:3 by volume. The volume of the mixture is then doubled by adding solution A such that the resulting mixture has 72% alcohol. If solution A has 60% alcohol, then the percentage of alcohol in solution B is?
  1. 92%
  2. 90%
  3. 94%
  4. 89%
Answer: 92%

Solution:
As per question , if B has b % alcohol then,
(60 + 3b+ 4*60)/8 = 72
300+ 3b = 576
3b = 276
b = 92


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