If a: b = 3:4, b:c = 7:9, c:d = 5:7, find a:d? Choose the correct choice from the following choices
A) 5:12	B) 7:12	C) 3:11	D) 5:11	E) 7:11
Explanation:   a/d = (3/4)*(7/9)*(5/7) =&gt; 5/12   5:12NSWER IS 5:12
<result>A</result>
If a: b = 3:4, b:c = 7:9, c:d = 5:7, find a:d?