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The monthly incomes of five persons are Rs. 1132, Rs. 1140, Rs. 1144, Rs. 1136 and Rs. 1148 respectively. What is their arithmetic mean?
Answer & Solution
Correct Answer:
Option
D
Arithmetic mean
$$\eqalign{ & = {\text{Rs}}{\text{. }}\left( {\frac{{1132 + 1140 + 1144 + 1136 + 1148}}{5}} \right) \cr & = {\text{Rs}}{\text{.}}\left( {\frac{{5700}}{5}} \right) \cr & = {\text{Rs}}{\text{. 1140}} \cr} $$
$$\eqalign{ & = {\text{Rs}}{\text{. }}\left( {\frac{{1132 + 1140 + 1144 + 1136 + 1148}}{5}} \right) \cr & = {\text{Rs}}{\text{.}}\left( {\frac{{5700}}{5}} \right) \cr & = {\text{Rs}}{\text{. 1140}} \cr} $$
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