- Home
- Standard 13
- Quantitative Aptitude
7.Profit and Loss
hard
$'A'$ buys an article and sells it to $'B'$ at a profit of $10 \%,{ }^{\prime} B ^{\prime}$ sells it to $'C ^{\prime}$ gaining $20 \% .$ If $'C ^{\prime}$ gives $RS.\,924,$ what amount did $'A'$ give? (in $Rs.$)
A
$700$
B
$724$
C
$780$
D
None of these
Solution
We have, $m=10, n=20, z=₹ 924$
$\therefore$ Cost price of $A$
$=\left[\frac{100^{2} z}{(100+m)(100+n)}\right]$
$=\left[\frac{100 \times 100 \times 924}{(100+10)(100+20)}\right]=\frac{100 \times 100 \times 924}{110 \times 120}$
$=Rs. 700$
Standard 13
Quantitative Aptitude
