If 300 billion French francs is equivalent to 50 billion United States dollars, which of the following expressions represents the number of United States dollars equivalent to f francs?	Options
A) f/7	B) f/6	C) f/8	D) f/10	E) 10f
300 billion French francs = 50 billion   =&gt; 300 French francs = 50 USD   =&gt; 6 French francs = 1 USD   1 French francs = 1/6 USD   So, f Francs equals f/6   Answer : f/6
<result>B</result>
If 300 billion French francs is equivalent to 50 billion United States dollars, which of the following expressions represents the number of United States dollars equivalent to f francs?