Average age of 16 students is 18 years. If 4 students leave the class, then the average age decreases by 1.5 years. Find the average age of the students...
The average of five consecutive odd numbers is 45. What is the average of the first three numbers among them?
The average number of books on history, polity and geography in a library is 110, and the average number of books on history and geography is 120. If th...
In a family of 8, the men eat on average 70 kg of food and women eat on an average 51 kg of food. The men and women are equal in number. A woman joined ...
Average number of pages in 54 books is 240. Two more books with pages (b + 20) and (b - 8) are added, and the average becomes 242. Find (b - 100).
Four numbers, when arranged in ascending order, are w, x, y and z. The average of the smallest three numbers is 25.5 while the average of the largest th...
A football player scored 400 points in the first eight games of the season. Find the average points he must score in the next two games so that his aver...
The average age of a group of 10 students is 30 years. Two persons of age 25 years and 30 years, left the group and 2 persons of age 54 years and...
A student got an average score of certain marks in the first 16 tests. In the next 4 tests, she scored 76 marks on average. This raised her overall aver...
Average age of 3 children born at intervals of 2 years is 8. How old is the eldest child?
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