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7.Profit and Loss
hard
Some articles were bought at $6$ for $Rs. 5$ and sold at $5$ for $Rs. 6 .$ Gain percent is
A
$30$
B
$33 \frac{1}{3}$
C
$35$
D
$44$
Solution
$C.P.$ $=Rs. 5 / 6 ; \quad$ $S.P.$ $Rs.= 6 / 5$
$\operatorname{Gain} \%=\frac{ S.P. – C.P. }{ C.P. } \times 100$.
$=\frac{\frac{6}{5}-\frac{5}{6}}{\frac{5}{6}} \times 100=\frac{\frac{36-25}{30}}{\frac{5}{6}} \times 100$
$=\frac{11}{30} \times \frac{6}{5} \times 100=\frac{11}{25} \times 100=44 \%$
Standard 13
Quantitative Aptitude