The compound ratio of 5:7, 3:2 and 4:5? Choose the correct choice from the following options
A) 1:7  B) 6:5  C) 6:7  D) 4:7  E) 6:9
5/7 * 3/2 * 4/5 = 6/7   6:7   ANSWER:6:7
<result>C</result>
The compound ratio of 5:7, 3:2 and 4:5?