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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 ## 1 more Mixture problem ##### This topic has expert replies Senior | Next Rank: 100 Posts Posts: 41 Joined: 02 Mar 2009 ### 1 more Mixture problem by nadib002 » Thu Apr 28, 2011 9:32 am Bryan discovers at the end of the summer that his radiator antifreeze solution has dropped below the safe level. If the radiator contains 4 gallons of a 255 solution, how many gallons of pure antifreeze must he add to bring it up to a desired 50% solution? What does "If the radiator contains 4 gallons of a 255 solution" mean? This was my approach amount of pure antifreeze = x gallons since we have to add "pure antifreeze" to the solution it would be 100% (x) desired = 50%(255) but how do i interpret "4 gallons of a 255 solution" Experts, please help Thank you Last edited by nadib002 on Thu Apr 28, 2011 9:59 am, edited 1 time in total. Legendary Member Posts: 582 Joined: 08 Mar 2011 Thanked: 61 times Followed by:6 members GMAT Score:740 by force5 » Thu Apr 28, 2011 9:46 am what is 4 gallons of a 255 solution?? is it a typo? Senior | Next Rank: 100 Posts Posts: 41 Joined: 02 Mar 2009 by nadib002 » Thu Apr 28, 2011 10:08 am @force5 I just edited my post. The "4 gallons of a 255 solution" is not a typo. That is how the problem is worded ### GMAT/MBA Expert GMAT Instructor Posts: 3225 Joined: 08 Jan 2008 Location: Toronto Thanked: 1710 times Followed by:613 members GMAT Score:800 by Stuart@KaplanGMAT » Thu Apr 28, 2011 10:43 am nadib002 wrote:@force5 I just edited my post. The "4 gallons of a 255 solution" is not a typo. That is how the problem is worded Given that "shift-5" = %, I'm pretty sure that it should be 25%, not 255. Change 255 to 25% and the question makes sense. Stuart Kovinsky | Kaplan GMAT Faculty | Toronto Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount BTG100 for$100 off a full course

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by nadib002 » Thu Apr 28, 2011 3:30 pm
Thanks Stuart. I was able to solve it using "4 gallons of a 25% solution" suggested by you.

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