Question

If the sum of 10 observations is 95, then their mean is

(a) 9.5 (b) 10 (c) 950 (d) 95

Answer 1

Sum of 10 observations = 95
$$\begin{gathered} \mathrm{Mean}=\frac{\mathrm{Sum}\mathrm{of}\mathrm{observations}}{\mathrm{Number}\mathrm{of}\mathrm{observations}} \\ =\frac{95}{10} \\ =9.5 \end{gathered}$$
Thus, the mean is 9.5.
Hence, the correct option is (a).