A dealer buys dry fruits at the rate of ` 100, ` 80 and ` 60 per kg. He bought them in the ratio 12 : 15 : 20 by weight. He in total gets 20% profit by selling the first two and at last he finds he has no gain or no loss in selling the whole quantity which he had. What was the percentage loss he suffered for the third quantity? Select.
A) 30% B) 40% C) 20% D) 50% E) None of these
Total quantity rate =   (12 * 100 + 15 * 80 + 20 * 60)= 
<gadget id="calculator">(12 * 100 + 15 * 80 + 20 * 60)</gadget>
<output>3_600</output>
3600   For first 2 qtys, (12 * 100) + (15 * 80)= 2400   40%ut he gets 20% profit = 2400 * 1.2= 
<gadget id="calculator">2400 * 1.2</gadget>
<output>2_880</output>
2880   So the third quantity= 3600 – 2880 = 720   Actual third quantity rate = 20  60 = 1200   Loss suffered = (1200 - 720) / 1200   = 480/1200 = 40 %   Answer: 40%
<result>B</result>
A dealer buys dry fruits at the rate of ` 100, ` 80 and ` 60 per kg. He bought them in the ratio 12 : 15 : 20 by weight. He in total gets 20% profit by selling the first two and at last he finds he has no gain or no loss in selling the whole quantity which he had. What was the percentage loss he suffered for the third quantity?