SSC CGL 20 Aug 2021 Shift 2 Paper

Let monthly income of $\mathit{A}$ and $\mathit{B}$
$=4\mathit{x}:5\mathit{x}$
Monthly expenditure of $\mathit{A}$ and $\mathit{B}$
$=3\mathit{y}:8\mathit{y}$
According to the question,
$\mathit{A}$ 's income $=\mathit{B}$ expenditure
$\Rightarrow 4\mathit{x}=8\mathit{y}$
$\Rightarrow \frac{\mathit{x}}{\mathit{y}}=\frac{2}{1}\Rightarrow \mathit{x}=2$ and $\mathit{y}=1$
Now, Saving of $\mathit{A}=4\mathit{x}-3\mathit{y}$
$=4\times 2-3\times 1$
$=8-3=5$
and Saving of $\mathit{B}=5\mathit{x}-8\mathit{y}$
$=5\times 2-8\times 1$
$=10-8=2$
$\therefore$ Ratio of saving of $\mathit{A}$ and $\mathit{B}=5:2$