If 10 litres of an oil of Rs.50 per litres be mixed with 5 litres of another oil of Rs.68 per litre then what is the rate of mixed oil per litre?	Choose one:  A) Rs.49.17  B) Rs.51.03  C) Rs.56  D) Rs.55.33  E) None of the above
50*10= 
<gadget id="calculator">50*10</gadget>
<output>500</output>
500   68*5= 
<gadget id="calculator">68*5</gadget>
<output>340</output>
340   840/15= 
<gadget id="calculator">840/15</gadget>
<output>56</output>
56   ANSWER:Rs.56
<result>C</result>
If 10 litres of an oil of Rs.50 per litres be mixed with 5 litres of another oil of Rs.68 per litre then what is the rate of mixed oil per litre?