For 15 people each has to pay Rs.20.For 20 people each has to pay Rs.18. For 40 people--how much has each to pay?
Pick one:  A) 5  B) 10  C) 15  D) 20  E) 25
15--&gt;20   20--&gt;18   25--&gt;16   30--&gt;14   35--&gt;12   40--&gt;10   ANSWER:10
<result>B</result>
For 15 people each has to pay Rs.20.For 20 people each has to pay Rs.18. For 40 people--how much has each to pay?