Good one EconGirl... completely missed that point...
Thats actually a very good point... There is a distinction between a finite decimal and a finite number.
In this case, if 1/b is a finite decimal then it is not of the form 0.333333... or 0.666666 .... or 0.111111
S1: 2/b is finite decimal...
i.e 2 (1/b) is finite which means 1/b is finite.
Sufficient to answer.
S2: 3/b is finite decimal
If 1/b = 1/12 then 3/b is finite decimal .. 1/b is finite decimal
If 1/b = 1/3 then 3/b is finite decimal but 1/b is not finte decimal
Therefore, Answer: A.
I would say A.
I think that a finite decimal refers to a whole number or a fraction as 1/2=.5
as opposed to 1/3=0.3333333333333333............. - not a finite decimal