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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 ## Solution A is 20% salt and Solution B is 80% salt. If you tagged by: BTGmoderatorLU ##### This topic has 2 expert replies and 0 member replies ### Top Member ## Solution A is 20% salt and Solution B is 80% salt. If you ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult Source: Veritas Prep Solution A is 20% salt and Solution B is 80% salt. If you have 30 ounces of solution A and 60 ounces of solution B, in what ratio could you mix Solution A with Solution B to produce 50 ounces of a 50% salt solution? A. 6:4 B. 6:14 C. 4:4 D. 4:6 E. 3:7 The OA is C ### GMAT/MBA Expert GMAT Instructor Joined 25 May 2010 Posted: 15348 messages Followed by: 1864 members Upvotes: 13060 GMAT Score: 790 BTGmoderatorLU wrote: Source: Veritas Prep Solution A is 20% salt and Solution B is 80% salt. If you have 30 ounces of solution A and 60 ounces of solution B, in what ratio could you mix Solution A with Solution B to produce 50 ounces of a 50% salt solution? A. 6:4 B. 6:14 C. 4:4 D. 4:6 E. 3:7 Since the desired salt percentage -- 50% -- is HALFWAY between the salt percentages for A and B (20% and 80%), the resulting solution must contain equal amounts of A and B. The correct answer is C. _________________ 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. ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2791 messages Followed by: 18 members Upvotes: 43 BTGmoderatorLU wrote: Source: Veritas Prep Solution A is 20% salt and Solution B is 80% salt. If you have 30 ounces of solution A and 60 ounces of solution B, in what ratio could you mix Solution A with Solution B to produce 50 ounces of a 50% salt solution? A. 6:4 B. 6:14 C. 4:4 D. 4:6 E. 3:7 The OA is C We see that we need 25 ounces of salt. We can go through the choices: A) 6:4 6x + 4x = 50 10x = 50 x = 5 So we have 6(5) = 30 ounces of A and 4(5) = 20 ounces of B. Does this produce 25 ounces of salt? 30 x 0.2 + 20 x 0.8 = 6 + 16 = 22 â†' No B) 6:14 6x + 14x = 50 20x = 50 x = 2.5 So we have 6(2.5) = 15 ounces of A and 14(2.5) = 35 ounces of B. Does this produce 25 ounces of salt? 15 x 0.2 + 35 x 0.8 = 3 + 28 = 31 â†' No C) 4:4 This means we have 25 ounces of A and 25 ounces of B. Does this produce 25 ounces of salt? 25 x 0.2 + 25 x 0.8 = 5 + 20 = 25 â†' Yes! Alternate Solution: Let A be the amount of Solution A and B be the amount of Solution B that produces a 50% salt solution when mixed. Since we want 50 ounces of 50% salt solution, there must be 50 x 0.5 = 25 ounces of salt in our solution. We have the following: A + B = 50 0.2A + 0.8B = 25 Letâ€™s rewrite these two equations: 2A + 2B = 100 2A + 8B = 250 Letâ€™s subtract the first equation from the second: 6B = 150 B = 25 Since A + B = 50, A = 25 also. Since there are A = 25 ounces of solution A and B = 25 ounces of solution B in our mixture, we need to mix A and B in the ratio of 1:1; or equivalently, 4:4. Answer: C _________________ Scott Woodbury-Stewart Founder and CEO scott@targettestprep.com See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews • FREE GMAT Exam Know how you'd score today for$0

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