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- Quantitative Aptitude
7.Profit and Loss
hard
A person purchases $8$ pens for ₹ $10$ and sells $10$ pens for ₹ $8.$ How much profit or loss does he make in ?
A
$30 \%$ gain
B
$30 \%$ loss
C
$36 \%$ gain
D
$36 \%$ loss
Solution
Price at which he bought the pencil $=₹ \frac{10}{8}=₹ 1.25$
Price at which he sold the pencil $=₹ \frac{8}{10}=₹ 0.80$ $\%$
Profit or loss $=\frac{0.8-1.25}{1.25}=\frac{-0.45}{1.25}=-36 \%$
$\%$ Profit or loss $=\frac{8 \times 8-10 \times 10}{10 \times 10} \times 100=\frac{-3600}{100}=-36 \%$
$\therefore \quad \%$ loss $=36 \%$
Standard 13
Quantitative Aptitude
