Ratio and Proportion Practice Test 4

Let the earnings of A and B be Rs. 4x and Rs. 5x initially.
New earnings of A $=\frac{120}{100}\times 4\mathit{x}$ = Rs. $\frac{24}{5}\mathit{x}$
and earnings of B $=\frac{80}{100}\times 5\mathit{x}$ = Rs. 4x
Then, $\frac{24}{5}\mathit{x}:4\mathit{x}=6:5$
$\Rightarrow \frac{24\mathit{x}}{5\times 4\mathit{x}}=\frac{6}{5}$
It does not give the value of x, hence, data is inadequate.