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# A certain mixture of paint requires blue, yellow, and red paints in

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A certain mixture of paint requires blue, yellow, and red paints in  [#permalink]

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26 Jun 2017, 02:07
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A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture?

(1) Exactly 20 quarts of the mixture are needed.
(2) Exactly 10 quarts of the yellow paint are available.

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Posts: 8184
Location: Pune, India
Re: A certain mixture of paint requires blue, yellow, and red paints in  [#permalink]

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26 Jun 2017, 22:06
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Bunuel wrote:
A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture?

(1) Exactly 20 quarts of the mixture are needed.
(2) Exactly 10 quarts of the yellow paint are available.

Blue : Yellow : Red = 2 : 3 : 1

We need to find the amount of Yellow paint required. On the ratio scale, it is 3 parts and the other two combined are 2 + 1 = 3 parts. So half of the mix must be yellow paint.

To find whether we have enough yellow, we need two things - how much yellow we have and how much mix we need.
Both statements together answer these questions and are hence sufficient.

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Karishma
Veritas Prep GMAT Instructor

Save up to $1,000 on GMAT prep through 8/20! Learn more here > GMAT self-study has never been more personalized or more fun. Try ORION Free! ##### General Discussion Manager Joined: 15 Mar 2015 Posts: 113 ### Show Tags 26 Jun 2017, 09:26 I - states How much We need of yellow. II - states How much We have of yellow. Answer: C Posted from my mobile device Manager Joined: 17 Feb 2016 Posts: 103 Location: India Concentration: General Management, Entrepreneurship GMAT 1: 660 Q47 V36 GPA: 3.12 WE: Education (Internet and New Media) Re: A certain mixture of paint requires blue, yellow, and red paints in [#permalink] ### Show Tags 26 Jun 2017, 10:02 3 1 Red and blue sufficient Yellow is sufficient? R:b:y =2:1:3 Yellow is 50% of total$$\frac{3}{6}$$ (1) Exactly 20 quarts of the mixture are needed. States 10 quarts of yellow paint is needed Available quantity of yellow is unknown NS (2) Exactly 10 quarts of the yellow paint are available Required quantity is unknown Available quantityof yellow paint is 10 quarts NS St 1+2 : 10 quarts of yellow paint is required and available Option C _________________ Never stop fighting until you arrive at your destined place - that is, the unique you. Have an aim in life, continuously acquire knowledge, work hard, and have the perseverance to realise the great life. A. P. J. Abdul Kalam Manager Joined: 23 May 2017 Posts: 240 Concentration: Finance, Accounting WE: Programming (Energy and Utilities) Re: A certain mixture of paint requires blue, yellow, and red paints in [#permalink] ### Show Tags 26 Jun 2017, 11:59 2 A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture? (1) Exactly 20 quarts of the mixture are needed. (2) Exactly 10 quarts of the yellow paint are available. given : 2x + 3x + x = 6x st[1] = 6x = 20 or x = $$\frac{10}{3}$$ : we do not know if we have this much Yellow paint==> Hence not sufficient st[1] = ok so we have in total 10 quarts of yellow paint : we do not know what is the final mixture amount, if it is 60 then Yellow is sufficient but if the needed mixture is 120 then we will need 20 quarts of yellow which w do not have ==> hence not sufficient st[1] + st[2] tells we need $$\frac{10}{3}$$ of yellow == which is less than the total yellow so its sufficient _________________ If you like the post, please award me Kudos!! It motivates me CEO Joined: 12 Sep 2015 Posts: 2699 Location: Canada Re: A certain mixture of paint requires blue, yellow, and red paints in [#permalink] ### Show Tags 24 Jul 2017, 11:07 2 Top Contributor 1 Bunuel wrote: A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture? (1) Exactly 20 quarts of the mixture are needed. (2) Exactly 10 quarts of the yellow paint are available. Target question: Is there enough of the yellow paint to make the desired amount of the mixture? Statement 1: Exactly 20 quarts of the mixture are needed. Since the ratio of blue : yellow : red = 2 : 3 : 1, we can conclude that we need: 20/3 quarts of blue paint 10 quarts of yellow paint 20/6 quarts of red paint Since we don't know how much yellow paint is available, we cannot answer the target question with certainty. So, statement 1 is NOT SUFFICIENT Statement 2: Exactly 10 quarts of the yellow paint are available. In this case, we don't know the VOLUME of mixed paint are needed. Consider these two cases: Case a: we need 6 quarts of the mixed paint, which means we need 2 quarts of blue paint, 3 quarts of yellow paint and 1 quarts of red paint. In this case, there IS enough yellow paint Case b: we need 600 quarts of the mixed paint, which means we need 200 quarts of blue paint, 300 quarts of yellow paint and 100 quarts of red paint. In this case, there is NOT enough yellow paint Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT Statements 1 and 2 combined Statement 1 tells us that we NEED 10 quarts of yellow paint Statement 2 tells us that we HAVE 20 quarts of yellow paint So, YES, there IS enough yellow paint Since we can answer the target question with certainty, the combined statements are SUFFICIENT Answer: RELATED VIDEO _________________ Brent Hanneson – Founder of gmatprepnow.com Senior Manager Joined: 06 Jul 2016 Posts: 415 Location: Singapore Concentration: Strategy, Finance Re: A certain mixture of paint requires blue, yellow, and red paints in [#permalink] ### Show Tags 08 Aug 2017, 08:12 Bunuel wrote: A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture? (1) Exactly 20 quarts of the mixture are needed. (2) Exactly 10 quarts of the yellow paint are available. b:y:r = 2:3:1 => b = 2x => y = 3x => r = x Total = 6x => y is half of total. y - available = required ? 1) 20 Quartz needed => 10 Quartz of yellow needed Yellow available ? Insufficient 2) 10 Quartz of yellow available Yellow needed ? Insufficient. 1+2) 10 Needed = 10 Required. Sufficient. C is the answer. _________________ Put in the work, and that dream score is yours! Target Test Prep Representative Status: Founder & CEO Affiliations: Target Test Prep Joined: 14 Oct 2015 Posts: 3161 Location: United States (CA) Re: A certain mixture of paint requires blue, yellow, and red paints in [#permalink] ### Show Tags 15 Nov 2017, 17:22 1 1 Bunuel wrote: A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture? (1) Exactly 20 quarts of the mixture are needed. (2) Exactly 10 quarts of the yellow paint are available. We are given the ratio: blue : yellow : red = 2x : 3x : x We need to determine if there is enough yellow paint available to allow the ratio to hold true. Statement One Alone: Exactly 20 quarts of the mixture are needed. We can create the following equation: 2x + 3x + x = 20 6x = 20 x = 20/6 = 10/3 Thus, we see that 3 x 10/3 = 10 quarts of yellow paint are needed. However, since we do not know how much yellow paint is available, statement one alone is not sufficient to answer the question. Statement Two Alone: Exactly 10 quarts of the yellow paint are available. Since we do not know how many quarts of paint are needed, we cannot answer the question. Statement two alone is not sufficient to answer the question. Statements One and Two Together: Using both statements together, we see that we need 10 quarts of yellow paint and we have exactly 10 quarts of yellow paint available. Thus, we have enough yellow paint. Answer: C _________________ Scott Woodbury-Stewart Founder and CEO GMAT Quant Self-Study Course 500+ lessons 3000+ practice problems 800+ HD solutions Intern Joined: 01 May 2017 Posts: 24 Re: A certain mixture of paint requires blue, yellow, and red paints in [#permalink] ### Show Tags 02 Apr 2018, 18:52 VeritasPrepKarishma wrote: Bunuel wrote: A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture? (1) Exactly 20 quarts of the mixture are needed. (2) Exactly 10 quarts of the yellow paint are available. Blue : Yellow : Red = 2 : 3 : 1 We need to find the amount of Yellow paint required. On the ratio scale, it is 3 parts and the other two combined are 2 + 1 = 3 parts. So half of the mix must be yellow paint. To find whether we have enough yellow, we need two things - how much yellow we have and how much mix we need. Both statements together answer these questions and are hence sufficient. Answer (C) VeritasPrepKarishma is it safe to generalize as follows: This question shows that in case of 3 or more ratios such as Blue : Yellow : Red = 2 : 3 : 1, you can combine any two ratios to get B&R : Y = 3:3 ? Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 8184 Location: Pune, India Re: A certain mixture of paint requires blue, yellow, and red paints in [#permalink] ### Show Tags 02 Apr 2018, 20:23 FANewJersey wrote: VeritasPrepKarishma wrote: Bunuel wrote: A certain mixture of paint requires blue, yellow, and red paints in ratios of 2:3:1, respectively, and no other ingredients. If there are ample quantities of the blue and red paints available, is there enough of the yellow paint to make the desired amount of the mixture? (1) Exactly 20 quarts of the mixture are needed. (2) Exactly 10 quarts of the yellow paint are available. Blue : Yellow : Red = 2 : 3 : 1 We need to find the amount of Yellow paint required. On the ratio scale, it is 3 parts and the other two combined are 2 + 1 = 3 parts. So half of the mix must be yellow paint. To find whether we have enough yellow, we need two things - how much yellow we have and how much mix we need. Both statements together answer these questions and are hence sufficient. Answer (C) VeritasPrepKarishma is it safe to generalize as follows: This question shows that in case of 3 or more ratios such as Blue : Yellow : Red = 2 : 3 : 1, you can combine any two ratios to get B&R : Y = 3:3 ? Yes, that is correct. Ratios give relative value of each of the constituents. So for 2 parts of Blue, you have 3 parts of Yellow and 1 part of Red. So Blue + Red will be 3 parts and Yellow will be 3 parts. _________________ Karishma Veritas Prep GMAT Instructor Save up to$1,000 on GMAT prep through 8/20! Learn more here >

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Re: A certain mixture of paint requires blue, yellow, and red paints in &nbs [#permalink] 02 Apr 2018, 20:23
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