a dealer buys 4 varieties of rice costing rs. 40,rs.42,rs.54 and rs.50 per kg in the ratio 6:5:10:9 and mixes all the four varieties and sells at 50% profit. What is the selling price per kg of rice?  Select the correct option: A) 68 B) 70 C) 72 D) 75 E) 77
72P = 40*6+42*5+54*10+50*9= 
<gadget id="calculator">40*6+42*5+54*10+50*9</gadget>
<output>1_440</output>
1440   SP= 1.5*1440= 
<gadget id="calculator">1.5*1440</gadget>
<output>2_160</output>
2160   Total no.of kgs=6+5+10+9= 
<gadget id="calculator">6+5+10+9</gadget>
<output>30</output>
30   SP per kg=2160/30= 
<gadget id="calculator">2160/30</gadget>
<output>72</output>
72   ANSWER:72
<result>C</result>
a dealer buys 4 varieties of rice costing rs. 40,rs.42,rs.54 and rs.50 per kg in the ratio 6:5:10:9 and mixes all the four varieties and sells at 50% profit. What is the selling price per kg of rice?