A contractor is engaged for 30days on the condition that he receives Rs.25 for eachday he works &is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was heabsent?	Pick.
A) 5 B) 10 C) 17 D) 25 E) 30
30 * 25= 
<gadget id="calculator">30 * 25</gadget>
<output>750</output>
750   425   -----------   325   25 + 7.50= 
<gadget id="calculator">25 + 7.50</gadget>
<output>32.5</output>
32.5   325/32.5= 
<gadget id="calculator">325/32.5</gadget>
<output>10</output>
10   10
<result>B</result>
A contractor is engaged for 30days on the condition that he receives Rs.25 for eachday he works &is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was heabsent?