The average of 5 results is 46, and the average of the first 4 results is 45. What is the 5th result?

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 of the first 8 numbers is 42. The average of the first 4 numbers is 40, and the average of the next 3 numbers is 44. What is the 8th number?

The average of 308, 125, 45, 120 and 102 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

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?