The inverse ratio of 9: 2: 1 is?
Options:
(A) 1:9:18
(B) 2:9:18
(C) 2:7:18
(D) 2:13:18
(E) 2:9:15 Stream of consciousness first, then make a decision:
1/9: 1/2: 1/1 = 2:9:18
Thus, the answer is (B).