a) 20%
b) 25%
c) $$16\frac{2}{3}$$%
d) $$33\frac{1}{3}$$%
Answer: d
Explanation: He gets 25% profit on the selling price.
$$\eqalign{
& Let\,S.P = x;\,then \cr
& C.P = x – {\frac{x}{4}} \cr
& = Rs.\,\frac{{3x}}{4} \cr
& Hence, \cr
& \% \,gain = {\frac{{ {\frac{x}{4}} }}{{ {\frac{{3x}}{4}} }}} \times 100 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{100}}{3} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 33\frac{1}{3} \cr} $$
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