4% of the population of a certain country owns both a car and a boat. If 20% of those who own a boat, do not own a car, what percentage of the country's population owns a boat?
Choose the correct choice from the following answers:
A) 5%
B) 7.5%
C) 10%
D) 12.5%
E) 15%
0.04x has B+C ( x is total population)   Let # of people who own a boat = y   20% of those who own a boat, do not own a car   =&gt; 0.2y do not have a car   =&gt; 80% of those who own a boat own a car   =&gt; 0.8y = 0.04x   =&gt; y/x = 4/80   So %age = 4/80 * 100= 
<gadget id="calculator">4/80 * 100</gadget>
<output>5</output>
5%   5%nswer - 5%
<result>A</result>
4% of the population of a certain country owns both a car and a boat. If 20% of those who own a boat, do not own a car, what percentage of the country's population owns a boat?