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.685 in all. For how many days was he absent? Choose the correct choice from the following
A) 8  B) 10  C) 2  D) 17  E) 19
30 * 25= 
<gadget id="calculator">30 * 25</gadget>
<output>750</output>
750   685   -----------   65   25 + 7.50= 
<gadget id="calculator">25 + 7.50</gadget>
<output>32.5</output>
32.5   62/32.5= 2   2
<result>C</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.685 in all. For how many days was he absent?