A dishonest milkman professes to sell his milk at cost price but he mixes it with water and thereby ...........

Quantitative Aptitude ( CCS) Mixture and Alligation

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:

35%

15%

25%

20%

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Explanation:

Solution:
Let CP of 1 litre milk be Rs 1
Then SP of 1 litre of mixture =Rs 1 Gain 25%
CP of 1 litre mixture =Rs (100/125*1)=4/5
Milk………………..Water
1………………………0
…………..4/5
4/5……………………1/5
Ratio 4:1
Hence %ge of water in the mixture =(1/5*100)=20%