The average of a number of quantities can be obtained by dividing the total of the quantities by the number of quantities Average = Total of the quantities / Number of quantities
1. Find the average of 135, 298, 391, 814, 272, 193, 584 and 729.
1) 431 2) 426 3) 412 4) 427 5) None of these
2. The average age of 4 boys is 11 years. The ages of three of them are 7 years, 12 years and 10 years. Find the age of the fourth student.
1) 12.5 yrs 2) 15 yrs 3) 12 yrs 4) 13 yrs 5) None of these
3. The average age of students in section A of 30 students is 9 years and the average age of students of section B of 20 students is 11 years. Find the average age of students in both sections taken together.
1) 10 yrs 2) 9.8 yrs 3) 10.4 yrs 4) 9.5 yrs 5) None of these
4. The average of seven numbers is 17. The average of first three numbers is 14 and the average of last three numbers is 19. What is the middle number?
1) 15 2) 17 3) 20 4) Can’t be determined 5) None of these
5. The average of five numbers is 18. The average of first three numbers is 16 and the last three numbers is 21. Find the third number.
1) 21 2) 19 3) 22 4) Can’t be determined 5) None of these
6. The average age of a class of 24 students is 11 years. If the teacher’s age is also included, the average increases by one year. Find the age of the teacher.
1) 35 2) 39 3) 34 4) 36 5) None
7. The average age of five children and their father is 13 years. It is reduced by 4 years if the father be excluded. How old is the
father?
1) 33 yrs 2) 36 yrs 3) 32 yrs 4) 42 yrs 5) None
8. The average weight of 6 persons increases by 1.5 kg when a person 54 kg weight is replaced by a new person. What could be the weight of the new person?
1) 55 kg 2) 67 kg 3) 62 kg 4) 63 kg 5) None of these
9. A train covers a distance of 275 kms in 5 hours and another distance of 225 kms in 3 hours. What is the average speed of the
train for the entire distance?
1) 57.5 kmph 2) 60 kmph 3) 62.5 kmph 4) 50 kmph 5) None of these
10. A cricketer’s average for 11 matches is 25 runs. In the next four matches he scored 72, 34, 51 and 62 runs. Find his new average
for the 15 matches.
1) 39 2) 34 3) 36 4) 28 5) None
11. The average of 20 numbers is 14 and it was later found that one of the numbers was misread as 26 instead of 36. What is the
correct average?
1) 15 2) 14.5 3) 17 4) 15.5 5) None
12. Present ages of Kavitha and Savitha are in the ratio 4:5
respectively. After six years the ratio becomes 5:6. What is present age of Kavitha?
1) 25 yrs 2) 20 yrs 3) 30 yrs 4) 35 yrs 5) None
13. In a company there are 600 male and 400 female employees. Their average wage was Rs. 25 per hour. If a female employee gets Rs. 5 less than a male employee, what was the wage of a male employee per hour?
1) Rs. 27 2) Rs. 22 3) Rs. 24 4) Rs. 29 5) None
14. The average marks of a student in English and Science is 87. His
average of marks in English and Maths is 72. What is the difference
between the marks which he obtained in Science and Maths?
1) 20 2) 35 3) 30 4) 25 5) None of these
15. The average temperature for Wednesday, Thursday and Friday is 32.8 °C. The average temperature for Thursday, Friday and Saturday is 33.1 °C. If Wednesday’s temperature recorded as 34 °C, find
Saturday’s temperature.
1) 39.2 °C 2) 34.9 °C 3) 38.2 °C 4) 41.2 °C 5) None of these
16. A tree is 4.6 metres tall, another is half as high and the third tree is 3 times the height of the first tree. Find the average height of the three trees.
1) 5.2 m 2) 6.1 m 3) 5.8 m 4) 6.9 m 5) None of these
17. A batsman has a certain average of runs for 14 innings. In the 15th innings, he makes a score of 67 runs, thereby increasing his
average by 3. What is the average after 15th innings?
1) 24 2) 22 3) 25 4) 27 5) None
18. A car travels a certain distance. The speed of the car for the first half is 80 kmph and for the remaining distance it is 120 kmph. What is the average speed of the car for the entire distance?
1) 100 kmph 2) 92 kmph 3) 85 kmph 4) Can’t be determined 5) None
19. Srinivas spends Rs.1350 per month on an average for the first seven months, Rs.1225 for next five months and saves Rs.2665 a
year. What is his average monthly income?
1) Rs.1520 2) Rs.1680 3) Rs.1750 4) Rs.1575 5) None of these
20. 5 kg sugar is purchased at Rs.10 per kg, 6 kg at Rs.11 and 9 kg at Rs.12 per kg. What is the weighted average price of sugar per kg?
1) Rs. 11 2) Rs. 10.9 3) Rs. 11.2 4) Rs. 11.8 5) None of these
Answers: 1-4; 2-2; 3-2; 4-3; 5-1; 6-4; 7-1; 8-4; 9-3; 10-5; 11-2; 12-5; 13-1; 14-3; 15-2; 16-4; 17-3; 18-5; 19-1; 20-3.