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7.Profit and Loss
medium
If $11$ Mango are bought for $Rs.\, 10$ and sold at $10$ for $Rs.\, 11 .$ What was Gain or Loss $\% ?$
A
$24$
B
$21$
C
$26$
D
$25$
Solution
$CP$ of $11$ Mangoes $=$ $Rs. 10$
$\Rightarrow$ $CP$ of $10$ Mangoes $=$ Rs. $\left[10 \times \frac{10}{11}\right]=$ Rs. $\frac{100}{11}$
SP of 10 Mangoes $=$ $Rs. 11$
$\%$profit $=\frac{11-\frac{100}{11}}{\frac{100}{11}} \times 100 \%$ $=21\%$
Standard 13
Quantitative Aptitude