Average
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Exam-level questions worked step by step. Try each one yourself first — then expand the solution and compare routes.
Q1.
The average of 8 numbers is 32.5. What is the sum of these numbers?
Q2.
The average age of 20 boys is 12 years and that of 30 girls is 11 years. The average age of all the students is:
Q3.
The average of 9 numbers is 27. If one number is excluded, the average of the remaining numbers becomes 25. The excluded number is:
Q4.
The average of 8 numbers is 24. If the number 20 is replaced by 44, the new average will be:
Q5.
A batsman scores 87 runs in his 17th innings and thus increases his average by 3 runs. His average after the 17th innings is: