If a:b = 3:1, then find (a - 3b)/(2a - b)?	Choose the correct choice from the following
A) 0	B) 1	C) 2	D) 1/7	E) 2/7
a/b = 3/1 =&gt; a = 3b   (a - 3b)/(2a - b) = (3b - 3b)/(6b - b)   = 0/7= 
<gadget id="calculator">0/7</gadget>
<output>0</output>
&gt; 0   0NSWER:0
<result>A</result>
If a:b = 3:1, then find (a - 3b)/(2a - b)?