Percentile

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jkelk: Junior | Next Rank: 30 Posts; Posts: 24; Joined: Mon Mar 12, 2012 3:05 am

Percentile

by jkelk » Wed Mar 14, 2012 10:53 am

Hi

Please help solve the attached.

Thanks,
J

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Source: Beat The GMAT — Quantitative Reasoning | Wed Mar 14, 2012 10:53 am

JanM: Junior | Next Rank: 30 Posts; Posts: 10; Joined: Fri Mar 09, 2012 3:25 am; Followed by:1 members

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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