In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the…

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 2011, the arithmetic mean of the annual incomes of Ramesh and Suresh was Rs. 3800. The arithmetic mean of the annual …

If 25a + 25b = 115, what is the average of a and b?

A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 67 ye…

The average of the first five multiples of 3 is-

The average of four consecutive even numbers is 15. The 2<sup>nd</sup> highest number is :

If the mean of a, b, c, is M and ab + bc + ca = 0, then the mean of a<sup>2</sup>, b<sup>2</sup>…