Mixtures and Alligation

A vessel contains mixture of petrol and kerosene oil in the ratio 4 : 3. When 105 liters of the mixture is taken out from the vessel and completely replaced by kerosene oil, then the ratio of petrol to kerosene oil in the resulting mixture gets reversed. Find initial quantity of mixture in the vessel.

A 10 litre solution of water and salt contains 150 g of salt. If 25% of the solution gets evaporated, then what percentage of salt would be left in the remaining solution?

In a tank, the ratio of two liquids A and B is 4 : 1. When 10 litres of the mixture is replaced by 10 litres of liquid B, the new ratio of liquid A and B in the tank becomes 2 : 3. How much quantity of liquid A was contained in the tank?

If 110 g of a salt is present in 550 g of solution, then the concentration of solution will be: [NTSE, Stage-1, 2018-19, Uttarakhand]

There are two container A and B. A contains mixture of milk and water in the ratio 3:Y and B contains 75 L of pure water only. 75 L of mixture from A is taken out and mixed in B so that final ratio of milk and water in the B is 3 : 7. Find value of Y.

A vessel contains an 80% alcohol solution. 20% of the solution was removed and replaced with water. If this process is repeated, find the percentage of alcohol which remains in the solution.

Krishna bought some wheat at Rs. 10 per kilogram. He buys 2 kg wheat from a ration shop at the rate of Rs. 8 per kilogram. He mixes the two and sells at Rs. 11 per kilogram. He makes 25% profit. What is the ratio of non-ration to ration wheat?

A vessel contains Milk and water in the ratio 4 : 1. When 6 lts water is added to it, the ratio of milk and water in the solution becomes 3 : 2. How many litres of solution were initially present in the vessel?

A vessel contains 1000 lts pure milk. 100 lts is removed and replaced by water. This process is repeated 2 more times. How many litres milk is now present in the solution?

A vessel contains pure milk. 10% of the contents of the vessel are removed and replaced by water thrice. Find the final concentration of milk in the solution.

A vessel contains 80% milk solution. 25% of the contents of the vessel is removed and replaced by water. Then 20% of the contents of the vessel is removed and replaced by water. Finally, 10% of the contents of the vessel is removed and replaced by water. What will be the final concentration of milk in the solution?

In a mixture of 25 L, the ratio of vinegar to water is 4 : 1. Another 3 L of water is added to the mixture. The ratio of vinegar to water in the new mixture is

A mixture of 30 L contains lime juice and soda in the ratio of 7 : 3. How much soda should be added to it so that the ratio of lime and soda becomes 3 : 7?

A mixture contains Milk and Water in the ratio 3 : 2 and another mixture contains them in the ratio 4 : 5. How many litres of the latter must be mixed with 3 L of the former so that the resulting mixture may contain equal quantities of the Milk and Water?