A shopkeeper earns 10% on an investment but loses 20% on another investment. If the ratio of the two investments is 2 : 3, then the combined loss percentage is:

Answer: Option D

Investments = 200 : 300
\begin{array}{*{20}{c}} {200}&:&{300} \\ {\,\,\,\,\,\,\,\,\,\, \downarrow + 10\% }&{}&{\,\,\,\,\,\,\,\,\,\, \downarrow - 20\% } \\ {220}&{}&{240} \end{array}
Investments = 500
After increase/decrease = 460
Loss = 40
Loss % = $$\frac{40}{500}$$ × 100 = 8%