Average Questions
Average questions test your ability to calculate a central value from a group of numbers. Practise finding averages, missing values, and changes in average when observations are added, removed, or replaced.
12 questions
- Given that the average of five consecutive odd numbers is 27, determine the product of the first and last numbers.
- The average age of a committee of 12 members is 40 years. A member aged 55 years retires and is replaced by a new member aged 31 years. What is…
- If \(a+\frac{1}{a}=2\), then find \(a^{2021}+\frac{1}{a^{2027}}\).
- The average salary of employees in a company is ₹20,000. If a new employee with a salary of ₹50,000 joins, the average increases by ₹500. Find the number of employees…
- The average of 20 numbers is 45. If each number is decreased by 7, what will be the new average?
- The average of 5 consecutive even numbers is 46. If the next 3 consecutive even numbers are added, what is the new average?
- In a warehouse, there are 3 stacks of bricks. The average weight of the bricks in Stack A is 112.5 kg, in Stack B is 118.75 kg, and in Stack…
- A company had 4 departments with an average of 45 employees each. Later, a fifth department was added with 90 employees. Due to restructuring, 10 employees from each of the…
- The average weight of 30 students is 60 kg. When the teacher's weight is included, the average becomes 61 kg. What is the weight of the teacher?
- Three groups of students have average marks 50, 60, and 70 respectively. The number of students in these groups are 20, 30, and 50. What is the combined average of…
- The average age of 20 students is 18 years. A group of 5 new students joins, increasing the average to 20 years. Find the average age of the 5 new…
- The average marks of 30 students is 55. If one student who scored 40 is replaced by another who scored 70, what will be the new average?