• NEW! FREE Beat The GMAT Quizzes
Hundreds of Questions Highly Detailed Reporting Expert Explanations
• 7 CATs FREE!
If you earn 100 Forum Points

Engage in the Beat The GMAT forums to earn
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 ## What is the selling price (in dollars) of the HK11B-connecto tagged by: fskilnik@GMATH ##### This topic has 1 expert reply and 0 member replies ### GMAT/MBA Expert ## What is the selling price (in dollars) of the HK11B-connecto ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult GMATH practice exercise (Quant Class 14) What is the selling price (in dollars) of the HK11B-connector (a specific electronic widget) in Mrs. Tao´s store? (1) In Mrs. Tao´s store, the difference between the selling price of the HK11B-connector and the cost of this electronic widget is 500 dollars. (2) If Mrs. Tao agrees on a 10% discount over the selling price of the HK11B-connector, her profit would be 20% over the cost of this electronic widget. Answer: _____(C)__ _________________ Fabio Skilnik :: GMATH method creator ( Math for the GMAT) English-speakers :: https://www.gmath.net Portuguese-speakers :: https://www.gmath.com.br ### GMAT/MBA Expert GMAT Instructor Joined 09 Oct 2010 Posted: 1434 messages Followed by: 32 members Upvotes: 59 fskilnik@GMATH wrote: GMATH practice exercise (Quant Class 14) What is the selling price (in dollars) of the HK11B-connector (a specific electronic widget) in Mrs. Tao´s store? (1) In Mrs. Tao´s store, the difference between the selling price of the HK11B-connector and the cost of this electronic widget is 500 dollars. (2) If Mrs. Tao agrees on a 10% discount over the selling price of the HK11B-connector, her profit would be 20% over the cost of this electronic widget. $$s,c\,\,\, \to \,\,\,\,\left[ {{\rm{dollars}}} \right]$$ $$? = s$$ $$\left( 1 \right)\,\,\,s - c = 500\,\,\,::\,\,\,\left\{ \matrix{ \,{\rm{Take}}\,\,\left( {s,c} \right) = \left( {600,100} \right)\,\,\,\, \Rightarrow \,\,\,? = 600\,\, \hfill \cr \,{\rm{Take}}\,\,\left( {s,c} \right) = \left( {700,200} \right)\,\,\,\, \Rightarrow \,\,\,? = 700\,\, \hfill \cr} \right.$$ $$\left( 2 \right)\,\,{9 \over {10}}s = {{12} \over {10}}c\,\,\,\,\,\mathop \Rightarrow \limits^{c\, \ne \,0} \,\,\,\,\,{s \over c} = {4 \over 3}\,\,\,\,\,\,::\,\,\,\,\left\{ \matrix{ \,{\rm{Take}}\,\,\left( {s,c} \right) = \left( {4,3} \right)\,\,\,\, \Rightarrow \,\,\,? = 4\,\, \hfill \cr \,{\rm{Take}}\,\,\left( {s,c} \right) = \left( {40,30} \right)\,\,\,\, \Rightarrow \,\,\,? = 40\,\, \hfill \cr} \right.\,\,$$ $$\left( {1 + 2} \right)\,\,\,::\,\,\,\left\{ \matrix{ \,\,s - c = 500\,\,\,\left( {\rm{I}} \right)\,\,\,\, \hfill \cr \,\left( {s,c} \right) = \left( {4k,3k} \right)\,\,\,\left( {{\rm{II}}} \right)\,\,\,\, \hfill \cr} \right.\left( {k > 0} \right)\,\,\,\,\,\mathop \Rightarrow \limits^{\left( {{\rm{II}}} \right)\,\,{\rm{in}}\,\,\left( {\rm{I}} \right)} \,\,\,\,\,\,k\,\,{\rm{unique}}\,\,\,\,\,\,\, \Rightarrow \,\,\,\,\,\,\,? = 4k\,\,\,{\rm{unique}}$$ The correct answer is (C). We follow the notations and rationale taught in the GMATH method. Regards, Fabio. _________________ Fabio Skilnik :: GMATH method creator ( Math for the GMAT) English-speakers :: https://www.gmath.net Portuguese-speakers :: https://www.gmath.com.br • 1 Hour Free BEAT THE GMAT EXCLUSIVE 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 • Free Practice Test & Review How would you score if you took the GMAT Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

Available with Beat the GMAT members only code

• FREE GMAT Exam
Know how you'd score today for \$0

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

### Top First Responders*

1 GMATGuruNY 56 first replies
2 Brent@GMATPrepNow 43 first replies
3 Jay@ManhattanReview 43 first replies
4 Ian Stewart 31 first replies
5 ceilidh.erickson 15 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

### Most Active Experts

1 Scott@TargetTestPrep

Target Test Prep

217 posts
2 fskilnik@GMATH

GMATH Teacher

124 posts
3 Max@Math Revolution

Math Revolution

89 posts
4 GMATGuruNY

The Princeton Review Teacher

82 posts
5 Brent@GMATPrepNow

GMAT Prep Now Teacher

66 posts
See More Top Beat The GMAT Experts