A dealer buys dry fruits at Rs. 100, Rs. 80 and Rs. 60 per kilogram. He mixes them in the ratio 3 : 4 : 5 by weight, and sells at a profit of 50%. At what price per kilogram does he sell the dry fruit?  Choose the correct answer:
A) Rs 80	B) Rs 100	C) Rs 95	D) None of these	E) Cannot be determined
Explanation :   Let the dealer buys 3kg, 4kg and 5kg.   Price of total dry fruits = 3*100 + 4*80 + 5*60= 
<gadget id="calculator">3*100 + 4*80 + 5*60</gadget>
<output>920</output>
Rs 920.   Profit= 920 * 115/100 = 1380.   Price of mix dry fruits per kg = 1380 / 12= 
<gadget id="calculator">1380 / 12</gadget>
<output>115</output>
Rs 115.   Answer : None of these
<result>D</result>
A dealer buys dry fruits at Rs. 100, Rs. 80 and Rs. 60 per kilogram. He mixes them in the ratio 3 : 4 : 5 by weight, and sells at a profit of 50%. At what price per kilogram does he sell the dry fruit?