SSC CGL 23 Aug 2021 Shift 1 Paper

Suppose he bought ₹ 100 bananas.
One fifth got rotten in $=100\times \frac{1}{5}=\mathit{₹}20$
Remain $=\mathit{₹}80$
SP of $\frac{2}{5}$ th of banana at $15\%$ profit
$=\frac{2}{5}\times 80\times \frac{115}{100}=36.8$
Remaining $80-32=\mathit{₹}48$ at $10\%$ profit SP of remaining banana
$=48\times \frac{110}{100}=\mathit{₹}52.8$
Total SP $=52.8+36.8=\mathit{₹}89.6$
He bought at ₹100, sold at ₹ $89.6$
$\therefore$ Loss per cent $=\frac{100-89.6}{100}\times 100$
$\therefore =10.4\%$ Loss