Use some thinking to answer the following question. The inverse ratio of 3: 5: 1 is?
Options:
(A) 2:3:7
(B) 5:3:15
(C) 2:3:2
(D) 2:3:6
(E) 2:3:1
1/3: 1/5: 1/1 = 5:3:15 So the final answer is (B).