A dinner set is quoted for Rs. 1500. A customer pays Rs. 1173 for it. If the customer get a series of two discounts and the rate of first discount is 15% then the rate of second discount was?

Answer: Option D

According to the question,
First discount = 15%
S.P. of dinner set after first discount = (100 – 15)% of Rs. 1500
$$\begin{array}{rl}& =Rs.\left(\frac{1500\times 85}{100}\right)\\ & =\text{Rs}\text{.}1275\end{array}$$
Second discount = Rs. ( 1275 – 1173 ) = Rs. 102
If second discount be d %, then
$$\begin{array}{rl}& \therefore \frac{1275\times \text{d}}{100}=102\\ & \Rightarrow d=\frac{102\times 100}{1275}\\ & =8\%\end{array}$$