DS - club

[Xbond]

Hi there,

Could you explain in the simplest this concept and how to resolve it


If 20 percent of the members in club A are members of club B also, which club has more
members?
(1) 30 percent of the members of B are members of A also.
(2) A has 600 members.

[real2008]

Hi there,

Could you explain in the simplest this concept and how to resolve it


If 20 percent of the members in club A are members of club B also, which club has more
members?
(1) 30 percent of the members of B are members of A also.
(2) A has 600 members.

from 1, 0.2A=0.3B

from this ratio we can say a has more member...hence A

from 2 we can not say anything

[BrianSmith]

(i) same number of people (members of both A+B) constitutes 30% of B but only 20% of A... so A is bigger. Sufficient.
(ii) 600*20%=120 people are members of both, but B may have 100 more or a 1000 more exclusive members so insufficient

[Xbond]

OA is A