Average
There are 15 questions on the topic Average for all competitive and academic exams.
Questions
The average of 7 results is 16, the average of the first three is 14 and that of the last three is 18. What is the fourth result?
- 16
- 48
- - 16
- - 8.4
- 6.8
In a set of three numbers, the average of the first two numbers is 4, the average of the last two numbers is 5, and the average of the first and the last numbers is 6. What is the average of three numbers?
- 30
- 5
- 15
- 3
- 2
The percentage of employees in a factory who are workers is 60%. All the remaining employees are executives. The annual income of each worker is Rs. 400. The annual income of each executive is Rs. 420. What is the average annual income of all the employees in the factory together?
- Rs. 256
- Rs. 408
- Rs. 260
- Rs. 356
- None of these
The average of 45 numbers is 32. If two numbers 30 and 45 are excluded, then the approximate average of the remaining numbers is
- 30.6
- 29.7
- 31.7
- 30.7
- 31.6
The average marks of 8 students in a group are 65. Three of them scored 75, 65 and 50 marks. What are the average marks of the remaining 5 students?
- 330
- 50
- 66
- 1000
- 625
There are two sections A and B of a class, consisting of 33 and 47 students, respectively. If the average weight of section A is 42 kg and that of section B is 32 kg, then what will be the average weight of the whole class?
- 0.9 kg
- 5920 kg
- 74 kg
- 36.125 kg
- 37 kg
Out of 9 given numbers, the average of the first 5 numbers is 6 and the last 5 numbers is also 6. If the average of all the 9 numbers is 5, then find the fourth number.
- 14
- 12
- 10
- 15
- 11
In a certain test, 4 students each had a score of 80, 10 students each had a score of 70, 4 students each had a score of 75, and 2 students each had a score of 50. What is the average score for 20 students?
- 71
- 75
- 72
- 80
- 81
A man on tour travels the first 120 km at 60 km/hr and the next 120 km at 75 km/hr. Find the average speed for the first 240 km of the tour.
- 66 km/hr
- 60 km/hr
- 66.67 km/hr
- 67.5 km/hr
- 69.67 km/hr
The average age of a committee of 6 is 45 years. If a member aged 30 resigns and a man aged 60 becomes a member, then the average age of the new committee is
- 30 years
- 50 years
- 40 years
- 42 years
- None of these
The average weight of 9 people is increased by 1.5 kg when one of them whose weight is 54 kg is replaced by a new man. The weight of the new man is
- 58.5 kg
- 67.5 kg
- 60 kg
- 64 kg
- None of these
The average of marks obtained by 125 candidates in a certain examination is 40. If the average marks of passed candidates is 40 and that of the failed candidates is 20, what is the number of candidates who passed the examination?
- 90
- 85
- 125
- 120
- None of these
The average of 40 boys of a class is equal to 15 yrs. When the age of the class teacher is included, the average becomes 16 yrs. Find the age of the class teacher.
- 45 years
- 56 years
- 30 years
- 22 years
- None of these
The average of 9 results is 50. If the average of first 5 results is 49 and last 5 results is 52, find the 5th result.
- 45
- 46
- 56
- 55
- None of these
A batsman in his 18th inning makes a score of 95 and thereby increases his average by 2. What is his average after 18th inning?
- 41
- 51
- 61
- 38
- None of these