List of top Quantitative Aptitude Questions on Average

The average number of copies of a book sold per day by a shopkeeper is 60 in the initial seven days and 63 in the initial eight days, after the book launch. On the ninth day, she sells 11 copies less than the eighth day, and the average number of copies sold per day from the second day to the ninth day becomes 66. The number of copies sold on the first day of the book launch is:
The average of 5 consecutive even numbers is 24. What is the largest of these numbers?
The average of 12 numbers is 15 and the average of the first two numbers is 1(D) What is the average of the remaining numbers?
There are three persons A B, and C in a room. If a person D joins the room, the average weight of the persons in the room reduces by x kg . Instead of D , if person E joins the room, the average weight of the persons in the room increases by 2 kg x . If the weight of E is 12 kg more than that of D , then the value of x is
Car sales in four consecutive months are given as 70, 68, 82, 95. Exponentially smoothing average method with a smoothing factor of 0.4 is used in forecasting. The expected no. of forecasted car sales in the next month is
Players are selected for Judo based on their body weights from the following 10 weight groups:

  1. (48 kg – 52 kg)
  2. (52 kg – 56 kg)
  3. (56 kg – 60 kg)
  4. (60 kg – 64 kg)
  5. (64 kg – 68 kg)
  6. (68 kg – 72 kg)
  7. (72 kg – 76 kg)
  8. (76 kg – 80 kg)
  9. (80 kg – 84 kg)
  10. (84 kg – 88 kg)
The average weight of the players after selecting one player from each group is 68 kg. If one of the players (named S) leaves the team, their average weight comes down to 66.5 kg.
The average age of 39 people is 15 years. If the age of the \(40^{th}\)person be included, then the average age increases by 3 months. What is the age of the \(40^{th}\) person?
The average salary of all the staff in a firm is 9200. The average salary of nine clerks is 10000 rupees and average of the rest is 8000. Calculate the total number of staff in the firm
Distance between the stadium A and B is 800 km. A train covers the journey from A to B at 80 kmph and return to A with a uniform speed of 40 kmph. Find the average speed of the train during the whole journey in kmph.
Players are selected for Judo based on their body weights from the following 10 weight groups:
1. (48 kg - 52 kg)
2. (52 kg - 56 kg)
3. (56 kg - 60 kg)
4. (60 kg - 64 kg)
5. (64 kg - 68 kg)
6. (68 kg - 72 kg)
7. (72 kg - 76 kg)
8. (76 kg - 80 kg)
9. (80 kg - 84 kg)
10. (84 kg - 88 kg)
The average weight of the players after selecting one player from each group is 68 kg. If one of the players (named S) leaves the team, their average weight comes down to 66.5 kg
While finding the average marks of the class, marks of one student were wrongly entered as 93 instead of 63 resulting to an increase in the average by 0.5 mark. The number of students in the class is.
In a football tournament, a player has played a certain number of matches and 10 more matches are to be played. If he scores a total of one goal over the next 10 matches, his overall average will be 0.15 goals per match. On the other hand, if he scores a total of two goals over the next 10 matches, his overall average will be 0.2 goals per match. The number of matches he has played is
Suppose hospital A admitted 21 less Covid infected patients than hospital B, and all eventually recovered. The sum of recovery days for patients in hospitals A and B were 200 and 152, respectively. If the average recovery days for patients admitted in hospital A was 3 more than the average in hospital B then the number admitted in hospital A was
In a football tournament, a player has played a certain number of matches and 10 more matches are to be played. If he scores a total of one goal over the next 10 matches, his overall average will be 0.15 goals per match. On the other hand, if he scores a total of two goals over the next 10 matches, his overall average will be 0.2 goals per match. The number of matches he has played is
Suppose hospital A admitted 21 less Covid infected patients than hospital B, and all eventually recovered. The sum of recovery days for patients in hospitals A and B were 200 and 152, respectively. If the average recovery days for patients admitted in hospital A was 3 more than the average in hospital B then the number admitted in hospital A was
Onion is sold for 5 consecutive months at the rate of Rs 10, 20, 25, 25, and 50 per kg, respectively. A family spends a fixed amount of money on onion for each of the first three months, and then spends half that amount on onion for each of the next two months. The average expense for onion, in rupees per kg, for the family over these 5 months is closest to
There are two sections A and B of a class, consisting of 35 and 45 students respectively. If the average weight of all the students of section A is 38 kg and that of all the students of section B is 42 kg, then what is the average weight of all the students in both the sections together?
In a basketball team with 12 players, the average height of the players is 170 cm. Out of these players, the average height of 7 players is 166 cm. What is the average height of the remaining 5 players?
In a class with 20 students, the average score in a test is 15. Out of the 20 students, 5 students scored 0 mark. What is the average marks of the remaining student if the students who scored 0 mark are excluded?
A group of 11 natural numbers is arranged in ascending order. The average of the first six numbers is 18 and the average of the last six numbers is 28. If the 7th number is the smallest prime number greater than 20, then what is the sum of all these numbers?
What is the average of first five perfect squares ending in 6?
The average of a group of 12 numbers increases by 1.5 when one of the numbers is replaced by 9. What is the value of the number that was replaced?
What is the average of first 101 consecutive odd numbers?
In a class of 24 students, if one new student weighing 72 kg is added, then average weight of the class is increased by 1 kg. If one more student weighing 61 kg is added, then the average weight of the class increases by 1.5 kg over the initial average. What is the initial average weight (in kg) of the class?
A shopkeeper has a total daily collection of 11,200, 10,650, 11,870 and 12,180 in 4 consecutive months. What should be the daily collection in the fifth month such that the average daily collection for 5 months become 11,050?