Average
1. The total marks obtained by a student in physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What are the average marks obtained by him in Physics and Mathematics together?
(1) 60
(2) 120
(3) 40
(4) Cannot be determined
(5) None of these
2. The average marks of 65 students in a class was calculated as 150. It was later realized that the marks of one of the students was calculated as 142, whereas his actual marks was 152. What is the actual average marks of the group of 65 the students? (Round off to two digits after decimal)
(1) 151.25
(2) 150.15
(3) 151.10
(4) 150.19
(5) None of these
3. The average weight of a group of 53 girls was calculated as 58 kg. It was later discovered that t he weight of one of t he girls was read as 65 kg, whereas her actual weight was 45 kg. What is the actual average weight of the group of the 53 girls? (rounded off to two digits after decimal)
(1) 58.62
(2) 58.37
(3) 57.37
(4) 57.62
(5) None of these
4. The sum of five number is 290. The average of the first two number is 48.5 and the average of the last two number is 53.5. What is the third number?
(1) 72
(2) 84
(3) 96
(4) 108
(5) None of these
5. The average of 5 positive integers is 436. The average of the first two number is 344 and average of the last two number is 554. What is the third number?
(1) 482
(2) 346
(3) 556
(4) 384
(5) None of these
6. The average monthly income of a family of four earnings members was Rs 15130. One of the daughter in the family got married and left home, so the average monthly income of the family came down to Rs 14660. What is the monthly income of the married daughter?
(1) Rs 15350
(2) Rs 12000
(3) Rs 16540
(4) Cannot be determined
(5) None of these
7. If 25a + 25b = 115, then what is the average of a and b?
(1) 4.6
(2) 2.5
(3) 4.5
(4) 3.4
(5) None of these
8. The total ages in class of 75 girls is 1050 yr. The average age of 25 of them is 12 yr and that of another 25 is 16 yr. Find the average age of the remaining girls.
(1) 12 yr
(2) 13 yr
(3) 14 yr
(4) 15 yr
(5) None of these
9. Find the average of the following set of scores. 302, 152, 132, 122, 112.
(1) 184
(2) 165
(3) 152
(4) 176
(5) None of these
10. Kamlesh bought 65 books for Rs 1050 from one shop and 50 books for Rs 1020 from another. What is the average price he paid per book?
(1) Rs 36.40
(2) Rs 18.20
(3) Rs 24
(4) Rs 18
(5) None of these
11. The average of 5 number is 306.4. The average of the first two number is 431 and the average of the last two number is 214.5. What is the third number?
(1) 108
(2) 52
(3) 321
(4) Cannot be determined
(5) None of these
12. The mean of the marks obtained by 100 students is 60. If the marks obtained by one of the students was incorrectly calculated as 75, whereas the actual marks obtained by him was 65, what is the correct mean of the marks obtained by the students?
(1) 59
(2) 58.50
(3) 50
(4) Cannot be determined
(5) None of these
13. The average age of a class of 65 boy was 14 yr, the average age of 20 of them was 14 yr, and that of another 15 was 12 yr. Find the average age of the remaining boys.
(1) 16 yr
(2) 13 yr
(3) 17 yr
(4) 15 yr
(5) None of these
14. If 
(1) 1/4
(2) 3/5
(3) 2
(4) 5
(5) None of these
15. Find the average of the following sets of scores 198, 309, 256, 488, 145, 326, 427.
(1) 307
(2) 315
(3) 298
(4) 326
(5) None of these
16. The average of four positive integers is 59. The highest integer is 83 and the lower integer is 29. The difference between the remaining two integers is 28. Which of the following integers is the higher of the remaining two integers?
(1) 48
(2) 76
(3) 39
(4) Cannot be determined
(5) None of these
17. The average of 5 consecutive odd numbers A, B, C, D and E is 47. What is the product of A and D?
(1) 2107
(2) 1935
(3) 2021
(4) 2193
(5) None of these
18. Average weight of 10 boys is more than the average weight of 15 girls by 5 kg. If the total weight of the 10 boys is 550 kg, what is the average weight of the 10 boys and 15 girls together?
(1) 52 kg
(2) 52.5 kg
(3) 53 kg
(4) 53.5 kg
(5) None of these
19. The average age of A, B and C is 26 yr. If the average age of A and C is 29 yr, what is the age of B in years?
(1) 26
(2) 20
(3) 29
(4) 23
(5) None of these
20. The sum of three consecutive even number is 44 more than the average of these numbers which of the following is the third (largest) of these numbers?
(1) 16
(2) 18
(3) 24
(4) Cannot be determined
(5) None of these
21. A, B, C and D are four consecutive even numbers respectively and their average is 65. What is the product of A and D?
(1) 3968
(2) 4216
(3) 4092
(4) 4352
(5) None of these
22. The sum of five numbers is 555. The average of the first two n umbers is 75 and the third number is 115. What is the average of the last two numbers?
(1) 145
(2) 290
(3) 265
(4) 150
(5) None of these
23. A, B, C, and D are four consecutive odd numbers and their average is 42. What is the product of B and D?
(1) 1860
(2) 1890
(3) 1845
(4) 1677
(5) None of these
24. The sum of five number is 260. The average of the first two numbers is 30 and the average of the last two number is 70. What is the third number?
(1) 33
(2) 60
(3) 75
(4) Cannot be determined
(5) None of these
25. If 16a + 16b = 48, what is the average of a and b?
(1) 3
(2) 2.5
(3) 1.5
(4) 5
(5) None of these
Directions (Q. Nos. 26 to 30) Each of the question below consists of a question and two statements marked A and B given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and given answer
(1) if the data in statement A alone is sufficient to answer the question
(2) if the data in statement B alone is sufficient to answer the question
(3) if the data either in statement A alone or in statement B alone is sufficient to answer the question
(4) if the data given in both statements A and B together are not sufficient to answer the question
(5) if the data in both stat3ements A and B together are necessary to answer the question
26. What is the age of C, in a group of A, B, C, D, and E whose average age is 45 yr?
A. Average of the ages of A and B is 53 yr.
B. Average of the ages of D and E is 47 yr.
27. What is the salary of C, in a group of A, B, C, D, E and F whose average salary is Rs 60600?
A. Total of the salaries of A and E is Rs 64500.
B. Total of the salaries of B and F is Rs 52600.
28. What is the salary of C, in a group of A, B, C, D and E whose average salary is Rs 47972?
A. Total of the salaries of B and D is an exact multiple of 7.
B. Average of the salaries of A, C and E is Rs 49326.
29. What is the salary of A in a group of A, B, C, D and E whose average salary is Rs 65780?
A. Total of the salaries of B and C is Rs 88545.
B. Total of the salaries of D and E is Rs 59020.
30. What is the salary of D, in a group of A, B, C, D, E and F whose average salary is Rs 505687?
A. Total of the salaries of A and F is Rs 78980.
B. Total of the salaries of B and C is to Rs 54665.
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