[Solved] Average Practice Question and Answers - Set 1
Added By: Mohit Bhardwaj | Created at: 12 Mar 2025 | Updated on: 12 Mar 2025 | Category: Average | Status: Published | ID: #5
Solved Average practice questions with answers - Set 1. Improve your skills with step-by-step solutions, formulas & shortcuts for competitive exams!
Q1: The average of 8 numbers is 19. The average of first and sixth numbers is 17 and that of the third, fifth and seventh numbers is \(24\frac{1}{3}\). If the second number is less than the fourth number by 8, and greater than the eighth number by 2, then the sum of fourth number and eighth number is:
1). 45
2). 21
3). 13
4). 32
1). 45
2). 21
3). 13
4). 32
Q2: In a committee there are 15 members. If two members whose ages are 45 years and 55 years are replaced by the two new members, then average age of 15 members is increased by 2 years. What is the average age (in years) of the new members?
1). 59
2). 61
3). 65
4). 68
1). 59
2). 61
3). 65
4). 68
Q3: The average weight of 20 students is 25 kg. By the admission of new student the average weight is reduced to 24.8 Kg. The weight of new student is :
1). 15 Kg
2). 20.8 Kg
3). 29 Kg
4). 22 Kg
1). 15 Kg
2). 20.8 Kg
3). 29 Kg
4). 22 Kg
Q4:
The average weight of 6 persons is increased by 2.5 kg when one of them whose weight is 50kg is replaced by a new man. What is the weight of the new man?
1).35 kg
2).65 kg
3).60 kg
4).50 kg
Q5:
1). 610
2). 510
3). 410
4). Can’t be determined
The average salary of the entire staff in the office is Rs. 120 per month. The average salary of officers is Rs. 460 and that of non- officers is Rs. 110. If the number of officers is 15, then find the number of non-officers in the office.
1). 610
2). 510
3). 410
4). Can’t be determined
Q6: The average weight of 40 passengers in a bus is 58 kg. When the weight of the driver, conductor and their two helpers is included, the average weight increased by 2 kg. When the weight of the bus is also included, the average weight becomes 7 times the average weight of the passengers, driver, conductor and their two helpers. Find the weight of the bus.
1). 16260 kg
2). 16480 kg
3). 16610 kg
4). 16850 kg
1). 16260 kg
2). 16480 kg
3). 16610 kg
4). 16850 kg
Q7:
Average of five numbers is 61. If the average of first and third numbers is 69 and the average of second and fourth numbers is 69, what is the fifth number ?
1). 31
2). 29
3). 25
4). 35
Average of five numbers is 61. If the average of first and third numbers is 69 and the average of second and fourth numbers is 69, what is the fifth number ?
1). 31
2). 29
3). 25
4). 35
Q8: On combining two groups of students having 30 and 40 average marks respectively in an exam, the resultant group has an average score of 34. Find the ratio of the number of students in the first group to the number of students in the second group.
1). 2 : 1
2). 3 : 2
3). 3 : 1
4). 4 : 3
1). 2 : 1
2). 3 : 2
3). 3 : 1
4). 4 : 3
Q9: The average of eight successive numbers is 6.5.The average of the smallest and the greatest numbers among them will be :
1). 4
2). 6.5
3). 7.5
4). 9
1). 4
2). 6.5
3). 7.5
4). 9
Q10: Three years ago the average age of a family of six members was 19 years. A boy have been born, the average age of the family is the same today. What is the age of the boy?
A). 1 year
B). 1.5 years
C). 2 years
D). 2.5 years