a) $$7\frac{1}{2}$$%
b) 5%
c) 10%
d) 6%
Answer: d
Explanation:
$$\eqalign{
& {\text{Required rate }}\% \cr
& {\text{ = }}\frac{{\left( {238.50 – 225} \right)}}{{225}} \times 100 \cr
& = 6\,\% \cr} $$
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