The mean of the squares of first natural numbers is

The mean of the square of first 11 natural number is

The sum of the squares of the first n natural numbers is 285, while the sum of their cubes is 2025. Find the values of n.

The AM of the squares of the first 'n' natural numbers is

If the sum of the squares of the first n natural numbers exceeds theri sum by 330 , then find ndot

Variance of first 20 natural numbers is

The variance of first 10 natural numbers is:

The difference between the sum of squares of first n natural numbers and the sum of first n natural numbers is always divisible by 2.

The variance of first n natural number is: