On a certain road 10% of the motorists exceed the posted speed limit and receive speeding tickets, but 50% of the motorists who exceed the posted speed limit do not receive speeding tickets. What percent of the motorists on the road exceed the posted speed limit? Pick.
A) 10.5%	B) 12.5%	C) 15%	D) 22%	E) 20%
0.1 M = 0.50 E   =&gt; E/M = 1/5* 100= 
<gadget id="calculator">1/5* 100</gadget>
<output>20</output>
20%   So answer is E.   M - # of Motorists   20% - # of Motorists exceeding speed
<result>E</result>
On a certain road 10% of the motorists exceed the posted speed limit and receive speeding tickets, but 50% of the motorists who exceed the posted speed limit do not receive speeding tickets. What percent of the motorists on the road exceed the posted speed limit?