Question

Find a single discount equivalent to following successive discounts of $20\%$, $10\%$ and $50\%$ in percent.

• A. $54\%$
• B. $64\%$
• C. $74\%$
• D. $84\%$

Answer 1

The correct option is B $64\%$

$\Rightarrow$ Single discount equivalent for successive discounts of $20\%$ and $10\%$.

$\Rightarrow$ $(20+10-\frac{20\times 10}{100})\%=28\%$

$\Rightarrow$ Single discount equivalent for successive discounts of $28\%$ and $50\%$.

$\Rightarrow$ $(28+50-\frac{28\times 50}{100})\%=64\%$