In the Bargaining Bazar everyone purchase with a fair bargaining, so the traders markup the prices too much. A trader marked up an article at Rs. M expected huge profit if it is sold on marked price. But a customer purchased it at $$\frac{{\text{M}}}{2}$$ with his fine bargaining skills, so the expected profit of the trader diminished by 66.66%. What is the percentage discount fetched by the customer through bargaining?
a) 33.33%
b) 50%
c) 60%
d) 66.66%
Answer: b
Explanation:
$$\eqalign{
& {\text{MP}} = M \cr
& {\text{SP}} = \frac{M}{2} \cr
& \% \,{\text{Discount}} \cr
& = {\frac{{ {\frac{M}{2}} }}{M}} \times 100 \cr
& = 50\% \cr} $$
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