A man had 7 children. When their average age was 12 years, a child aged 6 years died. Then average age of remaining six …

Out of 10 teachers of a school, one teacher retires and in place of him a new teacher 25 years old joins. As a result of…

The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the av…

A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the…

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

Find the average of first 97 natural numbers.

In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the aver…

Out of 9 persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expendit…