Milk contains 5% water. What content of pure milk should be added to 10 liters of milk to reduce this to 2%?  Select the correct option:	A) 10 liters	B) 15 liters	C) 20 liters	D) 18 liters	E) 22 liters

Rationale: "quantity of water in 10 liters = 5 % of 10 liters = 0.5 liters let x liters of pure milk be added . then , 0.5 / ( 10 + x ) = 2 / 100 2 x = 30 x = 15 liters answer is b"
Answer: B