A vessel contains ‘x’ liters of liquid X. ‘y’ liters of liquid are withdrawn from the vessel and is replaced with liquid Y, then another ‘y’ liters of liquid are withdrawn from the vessel and is replaced with liquid Y and the process continues for n times.

I have posted 10 questions in forum from this chapter (http://www.cat4mba.com/forum/ratio-proportion-and-variation-1 ) and ‘ll posting 100+ questions in next couple of days.

So enjoying solving the RPV questions.

For the basics please refer to the notes @