From a container, 6 liters milk was drawn out and was replaced by water. Again 6 liters of mixture was drawn out and was replaced by the water. Thus the quantity of milk and water in the container after these two operations is 9:16. The quantity of mixture is:  Choices.
A) 15  B) 26  C) 22  D) 27  E) 11
Explanation:   Let quantity of mixture be x liters.   Suppose a container contains x units of liquid from which y units are taken out and replaced by water. After operations , the quantity of pure liquid = units, Where n = no of operations .   So, Quantity of Milk =   Given that, Milk : Water = 9 : 16   Milk : (Milk + Water) = 9 : (9+16)   Milk : Mixture = 9 : 25   15nswer: 15) 15
<result>A</result>
From a container, 6 liters milk was drawn out and was replaced by water. Again 6 liters of mixture was drawn out and was replaced by the water. Thus the quantity of milk and water in the container after these two operations is 9:16. The quantity of mixture is: