Question

A 20 litre mixture of milk and water contains milk and water in the ratio
3:2. 10 liters of the mixture is removed and replaced with pure milk
and the operation is repeated once more. At the end of the two
removals and replacement, what is the ratio of milk and water in the
resultant mixture?​

Answer 1

Answer:

9:1

Step-by-step explanation:

20litre   3:2   12milk and 8water

-10litre(mixture)  3:2    6milk and 4water

+10litre(milk)   16milk and 4water  = 20litre(mixture)    4:1

-10litre(mix)    10litre    8milk and 2water

+10l milk    18milk and 2water     9:1