1. Find the average of 7, 10, 12, 15 and 16?

2. Find the average of Rs. 9.50 ps., Rs. 0.50 ps., Rs. 8.50 ps., Rs. 5.50 ps.

3. A milk man sold 20 litres of milk on first day, 17.5 litres of milk on second day and 21 litres of milk on third day. Find the average sales of the milk man?

4. A train traveled 52 Kms., in the first hour, 60 Kms., in the second hour and 58 Kms in the third hour. In the fourth hour there was a trouble in the engine and it could run only 26 Kms, Find the average speed of the train?

5. The average age of two children and their father is 17 years. The average age of the two children and their mother is 15 years. If the age of the father 36 years what is the age of the mother?

6. The average age of seven members is 40 and the average age of three of them is 28. Find the average age of the other four?

7. The average expenditure of A for 4 days is Rs. 6/-. If he spends Rs. 7.70 ps on first day, RS. 6.30 ps on second day and s. 10/- on third day, What is his expenditure on fourth day?

8. The average temperature on Monday, Tues and Wednesday is 36oC. The average temperature on Tuesday, Wednesday and Thursday is 38o C and that for Tuesday was 34o C. What was the temperature on Monday?

9. The average score of a cricket player for five innings is 20. If he scored 14, 30, 40 and 10 in 4 innings respectively. How many runs did he score in fifth inning?

10. The average expenditure of a man for the first five months is Rs. 120/- and for the next seven months is RS. 130/-. Find his monthly average income if he saves Rs. 290/- during the year?

11. In a class of 20 boys 5 boys secured 50 marks each in a test, 7 boys 45 marks,6 boys 25 and 2 boys 15. What was the average score of the class?

12. The average of three numbers is 135. The largest number is 180. If the difference of the other two numbers is 25 find the smallest number?

13. The average marks secured by 18 students is 75, the average marks secured by 18 students is 50 and the average marks secured by 12 students is 30. Find the average marks secured by all?

14. The average of 10 numbers is 13.7. If the average of first 5 numbers is 12.4 and the last 6 numbers is 14.5, find the value of the fifth number.