In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average…

A school has only four classes that contain 10, 20, 30 and 40 students respectively. The pass percentage of these classe…

The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then the average of the remaining numbers is n…

A student finds the average of 10, 2 digits numbers. If the digits of one of the numbers interchanged, the average incre…

A, B, C and D are four consecutive even numbers respectively and their average is 65. What is the product of A and D?

Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total c…

The batting average for 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest score by 172 run…

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…