Question

The mean of first seven even natural numbers is

(a) 7 (b) 8 (c) 9 (d) 6

Answer 1

The first seven even natural numbers are: 2, 4, 6, 8, 10, 12, 14.
$$\begin{gathered} \mathrm{Mean}=\frac{\mathrm{Sum}\mathrm{of}\mathrm{observations}}{\mathrm{Number}\mathrm{of}\mathrm{observations}} \\ =\frac{2+4+6+8+10+12+14}{7} \\ =\frac{56}{7} \\ =8 \end{gathered}$$
Thus, the mean of first seven even natural numbers is 8.
Hence, the correct option is (b).