Management Aptitude Test Feb 2012 Paper

(4) Let earnings of A and B are 4x and lx respectively.
Then, according to the questions,
∴ $\frac{4\mathit{x}+50\%\mathrm{of}4\mathit{x}}{7\mathit{x}-25\%\mathrm{of}7\mathit{x}}=\frac{8}{7}$
   $\frac{6\mathit{x}}{\frac{21}{4}\mathit{x}}=\frac{8}{7}$
⇒ $\frac{24\mathit{x}}{21\mathit{x}}=\frac{8}{7}$

From this equation, we cannot find the value of x.
Hence, data is inadequate.