The cost of pure milk is Rs.16 per liter. On adding water , the mixture is sold at Rs.15/ liter. In this way the milk man earns 25% profit .What is the ratio of milk and water in the mixture?

A. 25:7

B. 7:25

C. 15:1

D. 1:15

E. None of these

Solution(By Examveda Team)

Let X is the cost of pure Milk. Then,
Cost of Misture,
X + 25% of X = 15
100X + 25X = 15*100
125X = 15 *100
X = (15 *100)/125 = Rs. 12.
So, Milk of Rs. 12 sold at Rs. 15.
Part of Milk buyer gets in 12,
In Rs. 16 = 1 lit milk.
So, in 12 = 12/16 = 3/4 part milk he gets and 1/3 part water.
Therefore ratio Milk : water
3/4 : 1/3
= 3 : 1.