← CAT 2018 Slot 2 QA

CAT 2018 Slot 2 QA · Question 11

A 20% ethanol solution is mixed with another ethanol solution, say, S of unknown concentration in the proportion 1:3 by volume. This mixture is then mixed with an equal volume of 20% ethanol solution. If the resultant mixture is a 31.25% ethanol solution, then the unknown concentration of S is

  1. A.
    50%
  2. B.
    55%
  3. C.
    48%
  4. D.
    52%

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