DS Theory Question

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Nole23: Junior | Next Rank: 30 Posts; Posts: 26; Joined: Thu Jan 15, 2009 10:25 am

by Nole23 » Fri Jan 30, 2009 8:28 am

A DS question is answered by a yes/no. If statement 1 is sufficient and yields and yes, while statement 2 is sufficient and yields a no, the correct answer would still result in D correct?

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Source: Beat The GMAT — Data Sufficiency | Fri Jan 30, 2009 8:28 am

krisraam: Master | Next Rank: 500 Posts; Posts: 221; Joined: Wed Jan 21, 2009 10:33 amFollowed by: 1 member; Thanked: 12 times

by krisraam » Fri Jan 30, 2009 8:52 am

D says Each statement alone is sufficient. Not eithet stmt 1 or stmt 2.

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Raama

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Ian Stewart: GMAT Instructor; Posts: 2623; Joined: Mon Jun 02, 2008 3:17 amFollowed by: 355 members; Location: Montreal; Thanked: 1090 times; GMAT Score:780

Re: DS Theory Question

by Ian Stewart » Fri Jan 30, 2009 9:57 am

Nole23 wrote:A DS question is answered by a yes/no. If statement 1 is sufficient and yields and yes, while statement 2 is sufficient and yields a no, the correct answer would still result in D correct?

Thanks

That can't happen on a real GMAT question (though it may happen in some poorly designed test prep company questions). On the real GMAT, the two statements must always be logically compatible, so that it's logically possible to consider both statements together. If, for example, the first statement gives you a definite 'yes', then the second statement will either give you a definite 'yes', (the answer would then be D), or a 'maybe yes, maybe no' (the answer would then be A). The second statement could not possibly give you a 'definite no'.

For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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