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DS - club

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by Xbond » Sat Aug 29, 2009 7:59 am
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.
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Source: — Data Sufficiency |
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Re: DS - club

by real2008 » Sat Aug 29, 2009 9:29 am
Xbond wrote: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
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by BrianSmith » Sun Aug 30, 2009 4:13 am
(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
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by Xbond » Sun Aug 30, 2009 7:56 am
OA is A
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