Subject: General Aptitude · Chapter: Alligation or Mixture · Exam: · Marks: · Difficulty:
A dishonest milkman professes to sell his milk at cost price but he mixes it with water and thereby gains 25%. The percentage of water in the mixture is 1
(a)4%
(b)6 % 4
(c)20%
(d)25%
Answer
Answer (as printed): C
Explanation
Let C.P. of 1 litre milk be ` 1. Then, S.P. of 1 litre of mixture = ` 1, Gain = 25%. 100 4 C.P. of 1 litre mixture = ` ×1 = ` . 125 5 C.P. of 1 litre of milk C.P. of 1 litre of water `1 0 Mean price 4 ` 5 4 1 5 5 4 1 ∴ Ratio of milk to water = : = 4 : 1. 5 5 Hence, percentage of water in the mixture 1 = ×100 % = 20%. 5
Explanation as extracted from the printed page; notation may be imperfect.