Question

What is the arthmetic mean of first five natural number

Answer 1

$$\begin{gathered} \mathrm{The}\mathrm{first}5\mathrm{natural}\mathrm{numbers}\mathrm{are}: \\ 1,2,3,4\mathrm{and}5 \\ \mathrm{Mean}=\frac{\mathrm{sum}\mathrm{of}\mathrm{observations}}{\mathrm{number}\mathrm{of}\mathrm{observations}} \\ \mathrm{Mean}\mathrm{of}\mathrm{first}5\mathrm{natural}\mathrm{numbers}=\frac{1+2+3+4+5}{5}=\frac{15}{5}=3 \end{gathered}$$