EPFO 2015 English Medium Solved Paper

Let the CP of 1 dozen apple $=\mathit{x}$
Then, the CP of 1 apple $=\frac{\mathit{x}}{12}$ [ ∵1dozen=12units]
Given, the SP ot 100 apples = $8\mathit{x}$
Now, the SP of 1 apple = $\frac{8\mathit{x}}{100}$ $=\frac{2\mathit{x}}{25}$
∵ CP > SP, loss occured
∴ Required percentage $=\frac{\mathit{C}\mathit{P}-\mathit{S}\mathit{P}}{\mathit{C}\mathit{P}}\times 100$ %
$=\frac{\frac{\mathit{x}}{12}-\frac{2\mathit{x}}{25}}{\frac{\mathit{x}}{12}}\times 100$
$=\frac{25\mathit{x}-24\mathit{x}}{25\mathit{x}}\times 100$ $=4\%$ loss