SSC CGL 20 Aug 2021 Shift 1 Paper

Let the ratio of income of Ankit, Sanjay and Roshan is $12\mathit{x},9\mathit{x}$ and $7\mathit{x}$.
The ratio of expenditure of Ankit, Sanjay and Roshan is $15\mathit{y},9\mathit{y}$ and $8\mathit{y}$.
According to the question,

$\Rightarrow 12\mathit{x}-15\mathit{y}=3\mathit{x}$
$\Rightarrow 9\mathit{x}-15\mathit{y}=0$
$\Rightarrow \frac{\mathit{x}}{\mathit{y}}=\frac{5}{3}$
Put in above $\mathit{x}=5,\mathit{y}=3$
Income of Ankit $=12\times 5=\mathit{₹}60$
Income of Sanjay $=9\times 5=\mathit{₹}45$
Income of Roshan $=7\times 5=\mathit{₹}35$
Expenditure of Ankit $=15\times 3=\mathit{₹}45$
Expenditure of Sanjay $=9\times 3=\mathit{₹}27$
Expenditure of Roshan $=8\times 3=\mathit{₹}24$
The ratio of saving of Ankit, Sanjay and Roshan
$=\left(60-45\right):\left(45-27\right):\left(35-24\right)$
$=15:18:11$