The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases …

There were 35 students in a hostel. If the number of the students is increased by 7, then the expenses of the mess incre…

3 years ago the average of a family of 5 members was 17 years. A baby having been born, the average age of the family is…

The average expenditure of a man for the first five months of a year is Rs. 5000 and for the next seven months it is Rs.…

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

The average age of 40 students of class is 18 years. When 20 new students are admitted to the same class, the average ag…

The average weight of three boys A, B and C is $$\frac{{163}}{3}$$ kg, while the average weight of three boys B, D and E…

A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by h…