Question

The mean of first five natural numbers is

(a) 5 (b) 4 (c) 3 (d) 6

Answer 1

The first five natural numbers are: 1, 2, 3, 4, 5.
$$\begin{gathered} \mathrm{Mean}=\frac{\mathrm{Sum}\mathrm{of}\mathrm{observations}}{\mathrm{Number}\mathrm{of}\mathrm{observations}} \\ =\frac{1+2+3+4+5}{5} \\ =\frac{15}{5} \\ =3 \end{gathered}$$
Thus, the mean of first five natural number is 3.
Hence, the correct option is (c).