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- Quantitative Aptitude
7.Profit and Loss
hard
By Selling $80\, ball$ pens for $Rs.\, 140$, a retailer loses $30 \% .$ How many ball pens should he sell for $Rs.\,104$ so as to make a profit of $30 \% ?$
A
$32$
B
$52$
C
$48$
D
$42$
Solution
$C.P.$ of 80 ball pens $=140 \times \frac{100}{70}=₹ 200$
For a gain of $30 \%,$ $S.P.$ $=\frac{200 \times 130}{100}=₹ 260$
$\therefore \quad ₹ 260=80$ ball pens
$\therefore \quad ₹ 104=\frac{80}{260} \times 104=32$ ball pens
Standard 13
Quantitative Aptitude