1.

Giri sold two books . The selling price of a book equals the cost price of the second book. He sold the first book at 10% profit and the second book at 10% loss. Find the overall profit`//`loss percentage.A. `(5)/(21) %` profitB. `(5)/(21)%` lossC. `(10)/(21)%` profitD. `(10)/(21)%` loss

Answer» Correct Answer - D
Let the cost price of the first book be Rs 100x.
The profit made on it `=(10)/(100) (Rs 100x) =Rs 10x`
its selling price =Rs 110x
The cost price of the second book -Rs 110x.
The loss suffered on it `=(10)/(100)(Rs 111x) =Rs 11x`
Its selling price =Rs 99x
Total cost price `=Rs 210x`
Total selling price `=Rs 209x`
As `210 x gt 209x` on overall loss is made .
Overall loss = Rs x
`:. ` Overall loss percentage `=(x)/(210x) xx (100%) =(10)/(21)%`


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