A vessel is filled with liquid, 3 parts of which are water and 5 parts 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?

One -fourth of the boys and three -eight of the girls in a school participated in the annual sports. What prop...

I f the rate of simple interest is 12% per annum the amount that would fetch interest of TK. 6000 per annum is...

The compound interest on a certain sum of money for 2 years at 10% per annum is TK. 420 . The simple interest...

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the t...

A bag contains 2 red Roses, 4 yellow Roses and 6 pink Roses. Two roses are drawn at random. What is the probab...

The sum of the present ages of a father and his son is 60 years. Five years ago, father's age was four times t...