The average weight of 12 crewmen in a boat is increased by $$\frac{1}{3}$$ kg, when one of the crewmen whose weight is 5…

3 years ago the average of a family of 5 members was 17 years. A baby having been born, the average age of the family is…

The average of 8 numbers is 20. The average of first two numbers is $$15\frac{1}{2}$$ and that of the next three is $$21…

The average weight of boys in a class is 30 kg and the average weight of girls in the same class is 20 kg. If the averag…

In a group of 120 people, one-fifth are men, one-fourth are women and the rest children. The average age of women is fiv…

If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of…

The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weig…