Mixture replace with water

The ratio of milk and water is 7:3 .How much amount of the mixture should be replaced with water so that the amount of milk and water becomes equal in the vessel ?

A container is filled with liquid, 6 part of which are water 10 part milk. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half milk?

A vessel is filled with liquid,3 parts of which are water and 5parts syrup.How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup? (1)/(3) (b) (1)/(4) (c) (1)/(5) (d) (1)/(7)

A vessel contains 400 ltmilk. 20 ltof milk was replaced by water and then 40 ltof the resu lt ant mixture was replaced by water. Find the ratio of milk and water in result ant mixture.

A pot contains 81 litres of pure milk.(1)/(3) of the milk is replaced by the same amount of water again (1)/(3), of the mixture is replaced by that amount of water.Find the ratio of milk and water in the new mixture.

A vessel contains 20 liters of a mixture of milk and water in the ratio 3:2. 10 liters of the mixture are removed and replaced with an equal quantity of pure milk. If the process is repeated once more, find the ratio of milk and water in the final mixture obtained ?