If x and y are positive integers and 20x=10y what is the least possible value of xy?
Choose the correct choice from the following choices.
A) 14 B) 28 C) 63 D) 84 E) 100
20x=10y   =&gt; x/y = 1/2   =&gt; 2x=y   2(3)=1(3) =&gt; x*y=9 But it is not given   2(10)=1(10) =&gt; x*y=100   100
<result>E</result>
If x and y are positive integers and 20x=10y what is the least possible value of xy?