The average age of 3 children in a family is 20% of the average age of the father and the eldest child. The total age of…

Find the average increase rate, if increase in the population in the first year is 30% and that in the second year is 40…

A person purchase 1 kg of tomatoes from each of the 4 places at the rate of 1 kg, 2 kg, 3 kg, 4 kg per rupee respectivel…

The average of five numbers is 7. If three new numbers would be added, then the new average comes out to be 8.5. What is…

The average weight of 15 students in a class increases by 1.5 kg when one of the students weighing 40 kg is replaced by …

Which one of the following numbers can be removed from the set S = {0, 2, 4, 5, 9} without changing the average of set S…

If the average temperature of first four days of the week was 39°C and the average temperature of the week was 40&de…

There are two sections A and B of a class, consisting of 36 and 44 students respectively. If the average weight of secti…