In a cricket eleven, the average age of eleven players is 28 years. Out of these, the average age of three groups of thr…

The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its s…

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was…

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

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

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

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 of the three numbers x, y and z is 45. x is greater than the average of y and z by 9. The average of y and z…