Question

Pocket allowance of 5 students respectively are:
125, 75, 150, 175, 200
Find out arithmetic mean.

Answer 1

$$\begin{gathered} \mathrm{Arithmetic}\mathrm{Mean}=\overline{X}=\frac{\Sigma X}{N} \\ \mathrm{or},\overline{X}=\frac{125+75+150+175+200}{5} \\ \mathrm{or},\overline{X}=\frac{725}{5}=145 \\ \mathrm{Thus},\mathrm{the}\mathrm{mean}\mathrm{pocket}\mathrm{allowance}\mathrm{is}\mathrm{Rs}145. \end{gathered}$$