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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 At a certain university, the dormitory policy is that each This topic has 2 expert replies and 1 member reply Top Member At a certain university, the dormitory policy is that each Timer 00:00 Your Answer A B C D E Global Stats Difficult At a certain university, the dormitory policy is that each dormitory must have at least 7 resident advisers for every 200 residents. If a dormitory is home to 3500 residents, what is the minimum number of resident advisers required? A. 120 B. 121 C. 122 D. 123 E. 124 OA D Source: Veritas Prep Top Member Legendary Member Joined 29 Oct 2017 Posted: 737 messages Followed by: 4 members Top Reply 3,500 residents -> 17*200 residents + 100 residents For 3400, at least 17*7 = 119 resident advisors required. As there are at least 7 for 200 residents required, for 100, there are 7/2 required -> has to be an integer -> round up -> at least 4 for 100. For the remaining 100 residents: 4 resident advisors required Adding them up: 119 + 4 = 123 Hence, D is the correct answer. GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 1809 messages Followed by: 14 members Upvotes: 43 Top Reply BTGmoderatorDC wrote: At a certain university, the dormitory policy is that each dormitory must have at least 7 resident advisers for every 200 residents. If a dormitory is home to 3500 residents, what is the minimum number of resident advisers required? A. 120 B. 121 C. 122 D. 123 E. 124 We can create the following proportion, where n is the required number of resident advisers: n/3500 â‰¥ 7/200 200n â‰¥ 7 x 3500 2n â‰¥ 7 x 35 n â‰¥ 122.5 Thus, the minimum value of n is 123. Answer: D _________________ Scott Woodbury-Stewart Founder and CEO GMAT/MBA Expert GMAT Instructor Joined 08 Dec 2008 Posted: 12563 messages Followed by: 1245 members Upvotes: 5254 GMAT Score: 770 BTGmoderatorDC wrote: At a certain university, the dormitory policy is that each dormitory must have at least 7 resident advisers for every 200 residents. If a dormitory is home to 3500 residents, what is the minimum number of resident advisers required? A. 120 B. 121 C. 122 D. 123 E. 124 OA D Source: Veritas Prep One approach is to use equivalent ratios Each dormitory must have at least 7 resident advisers for every 200 residents. So, advisers/residents = 7/200 If a dormitory is home to 3500 residents, what is the minimum number of resident advisers required? Let x = minimum number of advisers We can write: 7/200 = x/3500 Cross multiply to get: (7)(3500) = 200x Divide both sides by 200 to get: (7)(3500)/200 = x Simplify: (7)(35)/2 = x Evaluate: 245/2 = x Solve: 122.5 = x Since we can't have HALF A PERSON, we must round up to 123 Answer: D Cheers, Brent _________________ Brent Hanneson â€“ Creator of GMATPrepNow.com Use our video course along with Sign up for our free Question of the Day emails And check out all of our free resources GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMATâ€™s FREE 60-Day Study Guide and reach your target score in 2 months! • Award-winning private GMAT tutoring Register now and save up to$200

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