Find the average of first 97 natural numbers.

Answer: Option D

1^st Method:
Average of 1^st n natural number is given by
$$=\frac{\frac{\text{n}\times \left(\text{n}+1\right)}{2}}{\text{n}}$$
Average of 1^st 97 natural number is given by
$$\begin{array}{rl}& \frac{\frac{97\times \left(97+1\right)}{2}}{97}\\ & =49\end{array}$$

2^st Method:
These numbers are in AP series so average.
$$\begin{array}{rl}& =\frac{\text{sum of corresponding term}}{2}\\ & =\frac{1+97}{2}=49\\ & \text{or, }\frac{2+96}{2}=49\\ & \text{or, }\frac{3+95}{2}=49\\ & \text{And so on}\text{.}\end{array}$$