# What is the Arithmetic Mean of the First n Natural Number?

- (n+1)/2
- n(n+1)/2
- 2(n+1)
- n²(n+1)/2

**Answer: (1) (n + 1)/2**

**Explanation:-**

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

Then, the average of n natural number = n (n + 1)/n 2

= (n + 1) / 2

Then, the average of n natural number is (n + 1) / 2

Hence, the answer is (1) n (n + 1)/2.