a) 14.875%
b) 15.375%
c) 15.575%
d) 16.375%
Answer: b
Explanation: Let C.P = 100; then marked price = 130;
Now, revenue
$$ = { {\frac{1}{2}} \times 130 + {\frac{1}{4}} \times 0.85 \times 130 + {\frac{1}{4}} \times 0.7 \times 130} $$
$$\eqalign{
& = 65 + 27.65 + 22.5 \cr
& = 115.4 \cr
& \% {\text{profit}} = \frac{{15.4 \times 100}}{{100}} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 15.4\% \cr} $$
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