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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 ## GMATPrep Question 18 ##### This topic has 3 member replies ## GMATPrep Question 18 Please help me!! not able to get the explanation!! Attachments This post contains an attachment. You must be logged in to download/view this file. Please login or register as a user. Legendary Member Joined 20 Jun 2007 Posted: 1153 messages Followed by: 2 members Upvotes: 146 Target GMAT Score: V50 Store Sold 90 copies last week. greatest number of copies = saturday second greatest number of copies = friday Statement I 8 copies sold on thursday 90-8 = 82 15 copies were sold monday, tuesday and wednesday 15*3 = 45 82-45 = 37 friday = 18 copies saturday = 19 copies 9 copies were sold on monday, tuesday and wednesday 9*3=27 82-27 =55 friday = 10 copies saturday = 45 copies Therefore insufficient. Statement II 38 copies were sold on saturday. 90-38=52 10 copies were sold on monday, tuesday, wednesday, thursday 10*4=40 at least 12 copies were sold on friday 11 copies were sold on monday, tuesday, wednesday, thursday 11*4 =44 52-44 = 8 copies sold on friday, this cannot be possible since friday has to be second greatest. Therefore sufficient. Hence B is the answer. Legendary Member Joined 16 Aug 2008 Posted: 891 messages Followed by: 1 members Upvotes: 27 Target GMAT Score: 750) GMAT Score: 660( I think answer is E because different number of books was sold. Even combining we have that except Thu and Sat 46 books were sold 46 can be arranged in different ways among 5 days and with Fri the biggest. We cannot assume that 10 copies were sold on monday, tuesday, wednesday, thursday 10*4=40 because we speak about different quantities on each day What is OA? Junior | Next Rank: 30 Posts Joined 20 Jul 2008 Posted: 29 messages Upvotes: 1 The OA is : B Yes you are right that th equestion states to have different numbers also, it states a seven day week rather than a 6 day week. I guess here it is that, how this is possible with B: 90-38=52. So 52 needs to be divided in 6 days. Option 1: Friday 12(greater then 11) gives 40 to be divided in 5 days, that makes an average of 8/day. It can be achieved by 6,7,8,9,10. Also it satisfies that Friday is second highest. If we take any other combination to make an average of 8 in 5 days, it will not give us Friday as the second highest. Option 2: Friday 10(less then 12) It gives us 42 to be divided in 5 days, that again makes out that any combination we try will not be able to make friday (10) as the second highest. So, it is clear that Option 1 is true, so only B is sufficient. making that on Friday the number was greater then 11..... With A: The picture is not clear about the highest number, so it can have N number of combinations and then Friday with second highest cane be greater then or less then 12....So not sufficient... I hope now you are able to get the explanation right.....Hope it helps!!! parallel_chase made some mistakes, but still managed to get the answer right, as the approach was correct and real good....thanks parallel_chase for making me understand the method..... • 1 Hour Free BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

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