If (2a + 3b)/(5a - 3b) = 23/5 , then the value of b : a is ?  Select
A) 4 : 1 B) 1 : 4 C) 4 : 5 D) 5 : 4 E) 1 : 2
(2a + 3b)/(5a - 3b) = 23/5   =&gt; 10a + 15b = 115a - 69b   =&gt; 105a = 84b =&gt; 5a = 4b   a/b = 4/5   ANSWER:5 : 4
<result>D</result>
If (2a + 3b)/(5a - 3b) = 23/5 , then the value of b : a is ?