By selling 100 oranges, a vendor gains selling price of 20 oranges. He gain percent is

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7.Profit and Loss

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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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