The average of 8 numbers is 20. The average of first two numbers is $$15\frac{1}{2}$$ and that of the next three is $$21…

Average weight of 25 persons is increased by 1 kg when one person weighing 60 kg is replaced by a new person. Weight of …

When the average age of a couple and their son was 42 years, the son married and got a child after one year. When the ch…

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…

Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average by 8 r…

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 price of 10 books is Rs. 12 while the average price of 8 of these books is Rs. 11.75. Of the remaining two b…

The average height of 35 girls in a class was calculated as 160 cm. It was later found that the height of one of the gir…