On a certain road, 20% of the motorists exceed the posted speed limit and receive speeding tickets, but 20% of the motorists who exceed the posted speed limit do not receive speeding tickets. What percent of the motorists on that road exceed the posted speed limit? Pick one:	A) 10.5%	B) 12.5%	C) 15%	D) 25%	E) 30%
suppose there are X motorists.   20% of them exceeded the speed limit and received the ticket, i.e. X/5.   Again, suppose total no. of motorists who exceeded the speed limit are Y.   20% of Y exceeded the speed limit but didn't received the ticket, i.e. Y/5.   it means 4Y/5 received the ticket.   hence, 4Y/5 = X/5   or Y/X=1/4   or Y/X * 100= 1/4 * 100= 
<gadget id="calculator">1/4 * 100</gadget>
<output>25</output>
25%   25%
<result>D</result>
On a certain road, 20% of the motorists exceed the posted speed limit and receive speeding tickets, but 20% of the motorists who exceed the posted speed limit do not receive speeding tickets. What percent of the motorists on that road exceed the posted speed limit?