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# gmatprepDS

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Manager
Joined: 22 Mar 2008
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02 Aug 2009, 21:53
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please explain this. OA is C
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Senior Manager
Joined: 26 Jul 2009
Posts: 343

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02 Aug 2009, 22:07
1. Insufficient. 'S' is positive.

2. Insufficient. 'R' and '-S' occupy the same position in the number line.

1 and 2: Sufficient. Since 'S' is positive thus 'R' (or '-S') is negative, thus '0' is definitely midway bet R and S.

Kudos [?]: 121 [0], given: 32

Re: gmatprepDS   [#permalink] 02 Aug 2009, 22:07
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