Q.1
The sum of three consecutive even numbers is 28 more than the average of these three number. Then the smallest of these number is -
Q.2
B was born when A was 4 years 7 months old and C was born when B was 3 years 4 months old. When C was 5 years 2 months old, then their average age was :
Q.3
The batting average for 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest score by 172 runs. If these two innings are excluded, the average of the remaining 38 innings is 48 runs. The highest score of the player is -
Q.4
The average age of 30 boys in a class in 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is :
Q.5
The average monthly income of A and B is Rs. 14000, that of B and C is Rs. 15600 and A and C is Rs. 14400. The monthly income of C is :
Q.6
4 boys and 3 girls spent Rs. 120 on an average, of which boys spent Rs. 150 on the average. The the average amount spent by the girls is-
Q.7
In a pre school, the average weight of 30 girls in a class among 50 students is 16 kg and that of the remaining students is 15.5 kg. What is the average weight of all the students in the class ?
Q.8
Out of nine persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expenditure of all the nine. The total money spent by all of them was :
Q.9
A man had 7 children. When their average age was 12 years, a child aged 6 years died. Then average age of remaining six children is :
Q.10
If average of 20 observations x1, x2, . . . . . x20 is y, then the average of x1 - 101, x2 - 101, x3 - 101, . . . . . x20 - 101 is :
Q.11
The average of 5 consecutive integers starting with 'm' is n. What is the average of 6 consecutive integers starting with (m + 2)?
Q.12
The average of 12 numbers is 15 and the average of the first two is 14. What is the average of the rest ?
Q.13
The average of the squares of first ten natural numbers is-
Q.14
If the difference between the average of x, y and y, z is 12, then the difference between x and z is :
Q.15
In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the same class is 87. If the girls and boys are in the ratio 4 : 5, average marks of the whole class (approx.) is closest to :
Q.16
Company C sells a line of 25 products with an average retail price of Rs. 1200. If none of these products sells for less than Rs. 420 and exactly 10 of the products sell for less than Rs. 1000, then what is the greatest possible selling price of the most expensive product?
Q.17
If the mean of 5 observations x, x + 2, x + 4, x + 6 and x + 8 is 11, then the mean of the last three observations is-
Q.18
The average of the two-digit numbers, which remain the same when the digits interchange their positions, is-
Q.19
The average of a non-zero number and its square is 5 times the number. The number is-
Q.20
The average marks of 14 students was 71. It was later found that the marks of one of the student has been wrongly entered as 42 instead of 56 and another as 74 instead of 32. What is the correct average ?
Q.21
In a 20 over match, the required run rate to win is 7.2. If the run rate is 6 at the end of the 15th over, the required run rate to win the match is :
Q.22
A fruit seller sold big, medium and small sizes apples of Rs. 15, Rs. 10 and Rs. 5, respectively. The total number of apples sold were in the ratio 3 : 2 : 5. Find the average cost of an apple.
Q.23
Average age of 6 sons of a family is 8 years. Average age of sons together with their parents is 22 years. If the father is older than the mother by 8 years, the age of mother (in years) is -
Q.24
The sum of the three consecutive even numbers is 44 more than the average of these numbers. Which of the following is the third largest of these numbers?
Q.25
The following table shows the number of working hours and the number of employees employed in a small scale industry
No. of working hours No. of employees
3 - 5 7
5 - 7 10
7 - 9 18
9 - 11 57
11 - 13 14
13 - 15 8

The average number of working hours of an employee is
Q.26
In Arun’s opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun’s weight is greater is that 60 kg but less than 70 kg. His mother’s view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimation, what is the average of different probable weights of Arun?
Q.27
A man bought 13 articles at Rs. 70 each, 15 at Rs. 60 each and 12 at Rs. 65 each. The average price per article is -
Q.28
The average salary, per head, of all the workers of an institution is Rs. 60. The average salary of 12 officers is Rs. 400; the average salary, per head, of the rest is Rs. 56. The total number of workers in the institution is -
Q.29
The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.2 year. The average age of the new students is :
Q.30
If a, b, c, d, e are five consecutive odd numbers, their average is :
0 h : 0 m : 1 s