A container has 50 litres of water. 10% of the water is taken out of the container and replaced by ink. This process is done once again.
What will be the proportion of ink and water in the resulting mixture?
19:81
Amount of water left = 50×910×910 = 40.5 litres
So, ink = 9.5 litres
So ratio of ink : water = 19:81