A producer of tea blends two varieties of tea from two tea gardens one costing Rs 18 per kg and another Rs 20 per kg in the ratio 5 : 3. If he sells the blended variety at Rs 21 per kg, then his gain percent is	Choices.
A) 12%
B) 13%
C) 14%
D) 15%
E) 16%
Explanation:   Suppose he bought 5 kg and 3 kg of tea.   Cost Price = Rs. (5 x 18 + 3 x 20) = Rs. 150.   Selling price = Rs. (8 x 21) = Rs. 168.   Profit = 168 - 150= 
<gadget id="calculator">168 - 150</gadget>
<output>18</output>
18   So, Profit %= (18/150) * 100= 
<gadget id="calculator">(18/150) * 100</gadget>
<output>12</output>
12%   Option 12%
<result>A</result>
A producer of tea blends two varieties of tea from two tea gardens one costing Rs 18 per kg and another Rs 20 per kg in the ratio 5 : 3. If he sells the blended variety at Rs 21 per kg, then his gain percent is