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magical cook: Master | Next Rank: 500 Posts; Posts: 484; Joined: Sun Jul 30, 2006 7:01 pmFollowed by: 1 member; Thanked: 2 times

by magical cook » Thu Aug 30, 2007 9:12 am

Hi,

I'm not too sure why statement 1 is sufficient.... (ab=1 for example, a=2, b=1/2 or a=1/2, b =2)

Can anyone help pls?

thank you!

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Source: Beat The GMAT — Data Sufficiency | Thu Aug 30, 2007 9:12 am

kajcha: Master | Next Rank: 500 Posts; Posts: 321; Joined: Tue Aug 28, 2007 5:42 am; Thanked: 1 times

by kajcha » Thu Aug 30, 2007 9:55 am

Stmt 1
(axb)(ayb) => ax*b*ab*y => ax*by*ab = 2*2*1 Suff

Stmt 2
(axb)(ayb) => ab*ab*xy = > 1*1*2 Suff

ANS D

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