# The Average of First 40 Natural Number is:

**Answer: (2) 20.5**

**Explanation:-
Formula-**

**The sum of natural number = n (n + 1)/2**

Where, n – number of natural number.

Then, the sum of first 40 natural number = 40 (40 + 1)/2

= 20 x 4 1

= 820

Now, the average of 40 natural number = 820/40

= 20.5

Hence, the answer is (2) 20.5.