Question

Find the average of the first $20$ natural numbers.

Answer 1

Find the Average Of First $20$ Natural Numbers:

The first $20$ natural numbers are $1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19$and $20$

We know that

$\mathrm{Average}=\frac{\mathrm{Sum}\mathrm{of}\mathrm{the}\mathrm{numbers}}{\mathrm{Number}\mathrm{of}\mathrm{numbers}}$

$$\begin{gathered} \therefore \mathrm{Average}=\frac{(1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20)}{20} \\ =\frac{210}{20} \\ =10.5 \end{gathered}$$

Hence, the Average of first $20$ natural number is $10.5$.