The mean of 5 numbers is 18. If one number is excluded, their mean is 16. Find the excluded number.

Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total c…

The average age of seven boys sitting in a row facing North is 26 years. If the average age of the first three boys is 1…

Which one of the following numbers can be removed from the set S = {0, 2, 4, 5, 9} without changing the average of set S…

The average of 25 results is 18. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13…

The average age of 30 students of a class is 14 years 4 months. After admission of 5 new students in the class the avera…

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of al…

The average of the first 100 positive integers is -