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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## 60% of all students in a class commute by public tagged by: AAPL ##### This topic has 1 expert reply and 0 member replies ### Top Member ## 60% of all students in a class commute by public ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult e-GMAT 60% of all students in a class commute by public transportation. If 30% of the students aspire to be scientists, which of the following can be the percentage of students who do not commute by public transportation and do not aspire to be scientists? I. 5% II. 30% III. 60% A. I only B. II only C. III only D. I and II only E. I, II and III OA B ### GMAT/MBA Expert GMAT Instructor Joined 25 May 2010 Posted: 15344 messages Followed by: 1864 members Upvotes: 13060 GMAT Score: 790 AAPL wrote: e-GMAT 60% of all students in a class commute by public transportation. If 30% of the students aspire to be scientists, which of the following can be the percentage of students who do not commute by public transportation and do not aspire to be scientists? I. 5% II. 30% III. 60% A. I only B. II only C. III only D. I and II only E. I, II and III Use a DOUBLE-MATRIX to organize the data. Let P = public transportation, NP = not public transportation, S = science, NS = not science. 60% of all students in a class commute by public transportation. 30% of the students aspire to be scientists. The following matrix is yielded: I: 5% do not commute by public transportation and do not aspire to be scientists The following matrix is yielded: Not viable: the red value cannot be greater than the blue value. Eliminate any answer that includes Statement I (A, D, and E). II: 30% do not commute by public transportation and do not aspire to be scientists The following matrix is yielded: This works. Eliminate any answer that does not include Statement II (C). The correct answer is B. III: 30% do not commute by public transportation and do not aspire to be scientists Not viable: the red value cannot be greater than the blue value. _________________ Mitch Hunt Private Tutor for the GMAT and GRE GMATGuruNY@gmail.com If you find one of my posts helpful, please take a moment to click on the "UPVOTE" icon. Available for tutoring in NYC and long-distance. For more information, please email me at GMATGuruNY@gmail.com. Student Review #1 Student Review #2 Student Review #3 Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now. • FREE GMAT Exam Know how you'd score today for$0

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