If a: b :: 3 : 7, then what is (5a+6b): (a-b)?
Answers:
A) 57:11
B) -57:4
C) 11 : 10
D) -11 : 10
E) -1 : 10
a/b= 3/7   Dividing numerator &amp; denominator of ' (5a+6b)/(a-2b) 'by b,   [5(a/b)+6]/[(a/b)-1]= [5*(3/7)+6]/[(3/7)-1]= -57/4   -57:4
<result>B</result>
If a: b :: 3 : 7, then what is (5a+6b): (a-b)?