If 2 tic equals 3 tacs and 2 tacs equal 7 tocs, what is the ratio of one tic to one toc?
Choose the most appropriate option:
A) 15/2  B) 6/5  C) 21/4  D) 3/10  E) 1/15
2Tic=3*Tac and 2*Tac=7*Toc;   4*Tic=6*Tac and 6*Tac=21*Toc --&gt; 4*Tic=21*Toc --&gt; Tic/Toc=21/4.   Answer: 21/4.
<result>C</result>
If 2 tic equals 3 tacs and 2 tacs equal 7 tocs, what is the ratio of one tic to one toc?