It is currently 23 Nov 2017, 20:35

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Two dressmakers, Sue and Anne, sewed costumes for a local theater prod

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42338

Kudos [?]: 133160 [0], given: 12415

Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 29 Oct 2015, 01:28
Expert's post
8
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

59% (01:06) correct 41% (01:28) wrong based on 248 sessions

HideShow timer Statistics

Two dressmakers, Sue and Anne, sewed costumes for a local theater production. Sue sewing alone for 10 hours sewed some of the costumes, Anne sewing for 16 hours finished sewing the remaining costumes. How any hours would it have taken Sue alone to sew all of the costumes?

(1) Sue sewed 1 costume every 2 hours.
(2) Sue sewed twice as many costumes working in 10 hours as Anne produced in 16 hours.


Kudos for a correct solution.
[Reveal] Spoiler: OA

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 133160 [0], given: 12415

Intern
Intern
avatar
Joined: 26 Jul 2015
Posts: 1

Kudos [?]: [0], given: 7

Re: Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 29 Oct 2015, 03:04
Is 'C' the correct solution ?

Kudos [?]: [0], given: 7

Intern
Intern
User avatar
Status: Out of my Mind , will be back in 2 minutes
Joined: 27 Aug 2015
Posts: 13

Kudos [?]: 9 [0], given: 7

Location: India
GMAT 1: 610 Q49 V25
WE: Other (Other)
Re: Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 29 Oct 2015, 04:24
Ans is B ,

suppose Anne finished n costumes , then sue would have finished 2n costumes , therefore total costumes become 3n.

Question has asked us that in how much time sue would have finished total costumes.

We know sue takes 10 hrs to finish 2n costumes , therefore by unitary method we can easily find time taken by sue to finish 3n costumes.

Kudos [?]: 9 [0], given: 7

2 KUDOS received
Verbal Forum Moderator
User avatar
D
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 1612

Kudos [?]: 1012 [2], given: 81

Location: India
Concentration: General Management, Strategy
GPA: 3.2
WE: Information Technology (Consulting)
GMAT ToolKit User Reviews Badge CAT Tests
Re: Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 29 Oct 2015, 05:09
2
This post received
KUDOS
Amount of work done by Sue per hour = s
Amount of work done by Anne per hour = a
Total work done = w
10s + 16a = w

1. Sue sewed costume per hour s=1/2 costume per hour

Not sufficient

2. 10s = 2*(16a)
=> 5s = 16a
Sue will need 5 hours to complete Anne's part of the job .
Sue will complete the entire work in 10+5=15 hours working alone .

Answer B .
_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Kudos [?]: 1012 [2], given: 81

Expert Post
EMPOWERgmat Instructor
User avatar
P
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 10178

Kudos [?]: 3536 [0], given: 173

Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: 340 Q170 V170
Re: Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 30 Oct 2015, 14:09
Hi sachinsnambiar,

In DS questions, you should be able to PROVE whatever solution you think is correct. One of the easiest ways to LOSE points on the GMAT is to not do work (or do very little work 'in your head"). You should elaborate on why you think the answer is C; if you made a logical mistake, then we should be able to fix it.

GMAT assassins aren't born, they're made,
Rich
_________________

760+: Learn What GMAT Assassins Do to Score at the Highest Levels
Contact Rich at: Rich.C@empowergmat.com

Rich Cohen

Co-Founder & GMAT Assassin

Special Offer: Save $75 + GMAT Club Tests Free
  Official GMAT Exam Packs + 70 Pt. Improvement Guarantee
www.empowergmat.com/

***********************Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!***********************

Kudos [?]: 3536 [0], given: 173

Intern
Intern
avatar
Joined: 13 Sep 2015
Posts: 10

Kudos [?]: [0], given: 0

Re: Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 01 Nov 2015, 05:32
Bunuel wrote:
Two dressmakers, Sue and Anne, sewed costumes for a local theater production. Sue sewing alone for 10 hours sewed some of the costumes, Anne sewing for 16 hours finished sewing the remaining costumes. How any hours would it have taken Sue alone to sew all of the costumes?

(1) Sue sewed 1 costume every 2 hours.
(2) Sue sewed twice as many costumes working in 10 hours as Anne produced in 16 hours.


Kudos for a correct solution.



Solution:-

Lets look at the information given in the question:-

Sue sewed some costumes for 10 hrs, lets assume Sew sews x costumes per hour, therefore she sew 10x costumes
Anne sewed teh rest of the costumes in 16 hrs, lets assume Anne sews y costumes per hour, therefore she sews 16y costumes .
Total costumes sown by Sue and Anne = 10x + 16y

The question is asking how much time is would take Sue to sew 10x+16y costumes.

Statement 1 - Sue sews 1 costume for every 2 hr. From here we know that Sue must have sown 5 costumes in 10 hrs. However since we dont know the total number of costumes sown by Anne, and neither do we know the rate at which Anne works we cannot find the total amount of costumes sown by Sue and Anne. Hence we can conclude that we cannot find out how much time Sue will take to complete the entire work, therefore statement 1 is insufficient.

Statement 2 - Sue sewed twice as many costumes in 10 hrs as Anne in 16 hrs. We have assumed earlier Sue Sews 10x costumes in 10 hrs, From Statement 2 we know that Sue sewed twice as many costumes than Anne, therefore Anne must have sewed 5x costumes in 16 hrs, and 16y= 5x.

Replacing 5x into 16y we get that the total work done is equal to 10x + 5x = 15x

Now using unitary method we can calculate that if Sue sewed 10x costumes in 10 hrs she would take 15 hrs to sew 15x costumes. Therefore statement 2 is sufficient to answer the question .

Answer - B

Tip - Understand the question and write down the information given and then devise an approach to answer the question. This allows a systematic way to approach the solution.
---------------------------------------------------------------------------------------------------------------------

Kudos for reply :)

Kudos [?]: [0], given: 0

Director
Director
User avatar
Joined: 04 Jun 2016
Posts: 647

Kudos [?]: 379 [0], given: 36

GMAT 1: 750 Q49 V43
Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 01 Aug 2016, 06:42
Bunuel wrote:
Two dressmakers, Sue and Anne, sewed costumes for a local theater production. Sue sewing alone for 10 hours sewed some of the costumes, Anne sewing for 16 hours finished sewing the remaining costumes. How any hours would it have taken Sue alone to sew all of the costumes?

(1) Sue sewed 1 costume every 2 hours.
(2) Sue sewed twice as many costumes working in 10 hours as Anne produced in 16 hours.


Kudos for a correct solution.


(1) Sue sewed 1 costume every 2 hours.
Sue worked ten hours therefore she her rate 10/2 = 5 costumes per hour
Number of costumes produced by Anne is not known, therefore total number of costumes in not known ; therefore time taken by sue to complete the rest of the work cannot be determined
INSIFFICIENT

(2) Sue sewed twice as many costumes working in 10 hours as Anne produced in 16 hours.
From stimulus we know Sue made "SOME" dresses and Anne made the "REAMAINING" dress
This option tell us Sue made 2x dresses and the remaining x dress were made by anne
Total dress made were =("Some + remaining"= all) = 2x+x= 3x
we know sue made 2x dress in 10 hour
therefore sue would made 3x dresses in 10 + 5 = 15 hour
SUFFICIENT

ANSWER IS B
_________________

Posting an answer without an explanation is "GOD COMPLEX". The world doesn't need any more gods. Please explain you answers properly.
FINAL GOODBYE :- 17th SEPTEMBER 2016. .. 16 March 2017 - I am back but for all purposes please consider me semi-retired.

Kudos [?]: 379 [0], given: 36

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 15506

Kudos [?]: 283 [0], given: 0

Premium Member
Re: Two dressmakers, Sue and Anne, sewed costumes for a local theater prod [#permalink]

Show Tags

New post 07 Nov 2017, 11:21
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Kudos [?]: 283 [0], given: 0

Re: Two dressmakers, Sue and Anne, sewed costumes for a local theater prod   [#permalink] 07 Nov 2017, 11:21
Display posts from previous: Sort by

Two dressmakers, Sue and Anne, sewed costumes for a local theater prod

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.