The mean of marks secured by 45 students in division A of class X is 69, 65 students of division B is 65 and that of 50 students of division C is 63. Find the mean of marks of the students of three divisions of Class X.

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 25088, and Rs 28098.56 respectively, what is the rate of interest?

Mansukh can do a piece of work in 10 hours. If he is joined by Jayanti who is 50% more efficient, in what time will they together finish the work?

Who is the author of "The Twentieth Wife"?

Who among the following has not scored even a single triple hundred in test matches?

Article 31B of the Indian Constitution "Validation of certain Acts and Regulations" deals with the

Indian Constitution has how many Parts?

The work done by centripetal force is ______.