A seller of used cars has 18 cars to sell and each of his clients selected 3 cars that he liked most. If each car was selected exactly thrice, how many clients visited the garage?  Choose the correct answer:
A) 8  B) 10  C) 12  D) 18  E) 16
IfNo caris selected more than once then the number of clients = 18/3= 
<gadget id="calculator">18/3</gadget>
<output>6</output>
6   But since every car is being selected three times so No. of Clients must be thrice as well= 6*3= 
<gadget id="calculator">6*3</gadget>
<output>18</output>
18   Answer: option 18
<result>D</result>
A seller of used cars has 18 cars to sell and each of his clients selected 3 cars that he liked most. If each car was selected exactly thrice, how many clients visited the garage?