The compound ratio of 1:4, 3:2 and 4:5?  Choose the correct choice:	A) 1:9	B) 1:7	C) 1:2	D) 3:10	E) 1:4
1/4 * 3/2 * 4/5   = 3/10   =3:10   Answer: 3:10
<result>D</result>
The compound ratio of 1:4, 3:2 and 4:5?