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Please Explain OG15 PS#218 and DS#72

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Source: — Quantitative Reasoning |
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by DavidG@VeritasPrep » Sun Jun 19, 2016 3:38 pm
shubh425 wrote:Hello,

I have issues understanding the PS#218 and DS#72 from OG15.

Can someone provide a better explanation than OG??

Thanks
For sorting/searching purposes, it'll be easier for other users if you make separate threads for these two questions and post the second question in the Data Sufficiency section.
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by shubh425 » Sun Jun 19, 2016 7:29 pm
Okay..I will start a new thread
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by Matt@VeritasPrep » Thu May 11, 2017 8:21 pm
Also be sure to post the text of the problem itself, that saves a lot of time and helps other students who don't have that edition of the OG.
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