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.
4 questions
- 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?