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…

In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 over…

The average marks of four subjects is 120. If 33 was misread as 13 during the calculation, what will be the correct aver…

The average of five numbers is 306.4. The average of the first two numbers is 431 and the average of the last two number…

The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. Th…

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new averag…

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

There are 3 groups of students, each containing 25, 50 and 25 students respectively. The mean marks obtained by the firs…