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Register now and save up to $200 Available with Beat the GMAT members only code • Magoosh Study with Magoosh GMAT prep Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • Reach higher with Artificial Intelligence. Guaranteed Now free for 30 days Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Free Practice Test & Review How would you score if you took the GMAT Available with Beat the GMAT members only code • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code ## Sample 701 - MBA.com - Tyrannosaurus rex This topic has 1 expert reply and 0 member replies anhhh Newbie | Next Rank: 10 Posts Joined 20 Aug 2015 Posted: 2 messages #### Sample 701 - MBA.com - Tyrannosaurus rex Wed Jan 13, 2016 11:13 am Hi, Can someone help explain why the answer to the first question is 4000-5000? http://www.mba.com/the-gmat-exam/gmat-exam-format-timing/integrated-reasoning/samples/Sample-701?next=yes The answer that I got was 2000-3000 because the average of the values from 12, 16, 20 and 30 was 900+3000+5100+5600 = 14600/4 = 3650. What did I do wrong? Thanks! ### GMAT/MBA Expert DavidG@VeritasPrep Legendary Member Joined 14 Jan 2015 Posted: 2667 messages Followed by: 120 members Upvotes: 1153 GMAT Score: 770 Wed Jan 13, 2016 5:09 pm anhhh wrote: Hi, Can someone help explain why the answer to the first question is 4000-5000? http://www.mba.com/the-gmat-exam/gmat-exam-format-timing/integrated-reasoning/samples/Sample-701?next=yes The answer that I got was 2000-3000 because the average of the values from 12, 16, 20 and 30 was 900+3000+5100+5600 = 14600/4 = 3650. What did I do wrong? Thanks! The problem is that you didn't pay attention to the weights between the ages you designated. Take a simple example. Imagine someone, at age 21, decides he's going to take that GMAT once a year until he's 25. At age 21, he scores a 400. At age 25, he scores an 800. Can we say that his GMAT average for the five years is (400+800)/2 = 600? Of course not - we need more info. If his scores for the five years are 400,400,400,400,800 his average will be weighted towards 400 and will be much less than 600. If his scores for the five years are 400, 800, 800, 800, 800, his average will be weighted towards 800 and will be much greater than 600. Notice, in the actual example, that the T Rex weight is going to over 5000 kg for the entire decade between ages 20 and 30. (Whereas the weight is under 2000 kg for a mere three years.) So the average weight for the entire period is going to be pulled towards high end of the range. _________________ Veritas Prep | GMAT Instructor Veritas Prep Reviews Save$100 off any live Veritas Prep GMAT Course

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