A contractor is engaged for 30days on the condition thathe receives Rs.25 for each day he works &is fined Rs.7.50 for each day is absent. He gets Rs.360 in all. For how many days was he absent?	Choose the correct answer.
A) 8
B) 12
C) 15
D) 17
E) 19
30 * 25= 
<gadget id="calculator">30 * 25</gadget>
<output>750</output>
750   360   -----------   380   25 + 7.50= 
<gadget id="calculator">25 + 7.50</gadget>
<output>32.5</output>
32.5   390/32.5= 
<gadget id="calculator">390/32.5</gadget>
<output>12</output>
12   12
<result>B</result>
A contractor is engaged for 30days on the condition thathe receives Rs.25 for each day he works &is fined Rs.7.50 for each day is absent. He gets Rs.360 in all. For how many days was he absent?