A man sells two articles at Rs. 99 each. He gains 10% on one and loses 10% on the other. Then on overall basis he -

$$\eqalign{ & {\text{Total Selling Price}} \cr & = {\text{Rs}}{\text{.}}\left( {2 \times 99} \right) \cr & = {\text{Rs}}.198 \cr & {\text{C}}{\text{.P}}{\text{. of first article}} \cr & = {\text{Rs}}.\left( {\frac{{100}}{{110}} \times 99} \right) \cr & = {\text{Rs}}{\text{. }}90 \cr & {\text{C}}{\text{.P}}{\text{. of second article}} \cr & = {\text{Rs}}.\left( {\frac{{100}}{{90}} \times 99} \right) \cr & = {\text{Rs}}{\text{. }}110 \cr & {\text{Total C}}{\text{.P}}{\text{.}} \cr & = {\text{Rs}}.\left( {90 + 110} \right) \cr & = {\text{Rs}}{\text{. }}200 \cr & \therefore {\text{Loss}} = {\text{Rs}}.\left( {200 - 198} \right) \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs}}{\text{. }}2 \cr} $$