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Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Source: — Quantitative Reasoning |
Junior | Next Rank: 30 Posts
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by JanM » Thu Mar 15, 2012 1:11 am
Hi jkelk,
just real quick - with no guarantee for correctness:


First Class: 90% of 80: 0.9*80=72
Second Class: 100-19=81

Sum of First and Second: 72+81=153

153 of two Classe combined in %?
Two classes combined: 180

%? -> 153/180=.85 or 85%

Hope that helps!
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