Related MCQs

•  The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average, one number namely 36 was wrongly read as 26. The correct average is?
•  The average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th observation?
•  The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. What is the last numbers?
•  The average age of three boys is 15 years and their ages are in proportion 3:5:7. What is the age in years of the youngest boy?
•  The average of first 10 prime numbers is?
•  The average of 8 numbers is 14. The average of 6 of these numbers is 16. What is the average of the remaining two numbers?
•  Calculate the average of the cubes of first five natural numbers.
•  What will be the average of even numbers between 11 to 63.
•  The average of A and B is 20 years. If C were to replace A, the average would be 19 and if C were to replace B, the Average would be 21. What are the ages of A, B and C ?
•  The average height of 40 student is 163 cm. On a particular day, three student A, B, C were absent and the average of the remaining 37 student was found to be 162 cm. if A, B have equal height and the