# Average of First 40 Natural Number is ;

**Answer: (3) 20.5
Explanation:-**

Sum of natural number is = n(n + 1)/2

where, n = number of natural numbers

Sum of 40 natural number = 40(40 + 1)/2

= 40 x 41/2

= 820

The average of 40 natural numbers = 820/40

= 20.5

Hence, the average of 40 natural numbers is 20.5