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7.Profit and Loss
medium
By selling $100$ oranges, a vendor gains the selling price of $20$ oranges. He gain percent is
A
$20$
B
$25$
C
$30$
D
$32$
Solution
Let, $S.P.$ of $100$ oranges be $₹ x$
$\therefore$ $S.P.$ of $20$ oranges $=\frac{x \times 20}{100}=₹ \frac{x}{5}=$ Gain
$\therefore \quad CP =x-\frac{x}{5}=₹ \frac{4 x}{5}$
$\therefore$ Gain percent $=\frac{\frac{x}{5}}{\frac{4 x}{5}} \times 100=\frac{100}{4}=25 \%$
Standard 13
Quantitative Aptitude
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