If 10 litres of an oil of Rs.50 per litres be mixed with 5 litres of another oil of Rs.66 per litre then what is the rate of mixed oil per litre? Select the correct option:
A) Rs.49.17
B) Rs.51.03
C) Rs.54.17
D) Rs.55.33
E) None of the above
50*10= 
<gadget id="calculator">50*10</gadget>
<output>500</output>
500   66*5= 
<gadget id="calculator">66*5</gadget>
<output>330</output>
330   830/15= 55.33   ANSWER:Rs.55.33
<result>D</result>
If 10 litres of an oil of Rs.50 per litres be mixed with 5 litres of another oil of Rs.66 per litre then what is the rate of mixed oil per litre?