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7.Profit and Loss
hard
Seema sells a pen to Sapna at a profit of $25 \% .$ Sapna sells it to Asha at a profit of $10 \%$ and Asha sells it to Kavita at a profit of $5 \%$. If Asha sells it for $Rs.\,231,$ find the cost price at which Seema bought the pen? (in $Rs.$)
A
$195$
B
$160$
C
$145$
D
$135$
Solution
Let $CP$ of pen for Seema be $Rs.\,100$
Seema $\underline{25 \%}$ Sapna $\underline{10 \%}$ Asha $\underline{5 \%}$ Kavita
$(100)$ $(125)$ $(137.5)$ $(144.375)$
Here, Asha sold her pen at $Rs.\,144.375$ if seema bought it at $Rs.\,100$ If Asha sold pen for Rs. $231,$ Seema bought it at
$=$ Rs. $\left[\frac{100}{144.375} \times 231\right]= Rs .160$
Standard 13
Quantitative Aptitude
