If a/b = 1/3, b/c = 2, c/d = 1/2, d/e = 3 and e/f = 1/10, then what is the value of abc/def ?	Choose the correct choice from the following choices.
A) 27 / 4
B) 27 / 8
C) 3 / 4
D) 3 / 20
E) 1 / 4

Rationale: say a = 2 . then : a / b = 1 / 3 - - > b = 6 ; b / c = 2 - - > c = 3 ; c / d = 1 / 2 - - > d = 6 ; d / e = 3 - - > e = 2 ; e / f = 1 / 10 - - > f = 20 . abc / def = ( 2 * 6 * 3 ) / ( 6 * 2 * 20 ) = 3 / 20 . answer : d .
Answer: D