If the operation € is defined for all x and y by the equation x € y = 2*x*y, then 6 € (4 € 5) =  Pick:	A) 480	B) 120	C) 160	D) 240	E) 360
working inside out,   (4 € 5) = 2*4*5= 
<gadget id="calculator">2*4*5</gadget>
<output>40</output>
40   6 € 40= 2*6*40= 
<gadget id="calculator">2*6*40</gadget>
<output>480</output>
480   Hence, answer is 480
<result>A</result>
If the operation € is defined for all x and y by the equation x € y = 2*x*y, then 6 € (4 € 5) =