The average marks of 13 papers are 40. Average of first 7 is 42 and last 7 is 35. Marks obtained in the 7th paper are

Average of 13 results is 65, if the average of first seven results is 62 and the average of last seven results is 67, then the seventh result is :

The average marks obtained by 150 candidates was 35. If the average marks of passed candidates was 39 and that of the failed candidate was 15, find the number of candidates who passed the examination…

If x is the average of 1², 2², 3², ..., 10² and y is the average of first 10 even natural numbers, then y is what percent of x − y?

The average of 6 numbers is 5. The first number is increased by 2, second by 4, third by 8 and so on. The average of new numbers is

If the average of m numbers is n*n and that of n numbers is m*m , then the average of m+n numbers is