What is the mean of the first 99 natural numbers?

Question: What is the mean of the first 99 natural numbers?

Solution:
The first 99 natural numbers are: 1, 2, 3, ..., 99.

We know,
Mean of the first n natural numbers = (n + 1)/2
∴ Mean = (99 + 1)/2 ; [Here, n = 99]
= 100/2
= 50
So, the mean of the first 99 natural numbers is 50.

Alternatively:
Sum = (99 × 100)/2 = 4950
Mean = Sum/99 = 4950/99 = 50
So, the average is exactly 50.