### The monthly incomes of five persons are Rs. 1132, Rs. 1140, Rs. 1144, Rs. 1136 and Rs. 1148 respectively. What is their arithmetic mean?

A. Rs. 1100

B. Rs. 1120

C. Rs. 1132

D. Rs. 1140

$\begin{array}{l}\text{Arithmetic mean}\\ =\text{ Rs. }\left(\Large\frac{1132+1140+1144+1136+1148}{5}\right)\\ =Rs\cdot\left(\Large\frac{5700}{5}\right)\\ =\text{ Rs. }1140\end{array}$