The compound ratio of 7:6, 3:2 and 4:5? Choose the correct choice from the following.
A) 7 : 5
B) 1 : 87
C) 1 : 6
D) 1 : 9
E) 1 : 2

Rationale: 7 / 6 * 3 / 2 * 4 / 5 = 7 / 5 7 : 5 answer : a
Answer: A