Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

DS question - need help

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 4
Joined: Sat Mar 30, 2013 9:24 am
by sjcl1526 » Sat Jun 01, 2013 12:35 pm
Hi - I am unable to get this question right especially on S1 and S1.Could anyone help me with this. Thank you!


At a certain wedding, the bar served only beer and wine. If 320 people attended the wedding and 200 attendees drank wine, how many attendees drank neither beer nor wine?

(1) There were the same number of beer drinkers as nondrinkers.

(2) The same number of people drank only beer as drank both beer and wine.

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked

Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked

Both statements (1) and (2) TOGETHER are sufficient to answer the question asked; but NEITHER statement ALONE is sufficient

EACH statement ALONE is sufficient to answer the question asked

Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed
Top
Join the discussion
Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
Posts: 423
Joined: Fri Jun 11, 2010 7:59 amFollowed by: 2 members
Location: Seattle, WA
Thanked: 86 times

by srcc25anu » Sat Jun 01, 2013 12:46 pm
we know total wine drinkers = 200
so total NOT WINE drinkers = 320-200 = 120
ST1: Same no of beer drinkers as non drinkers
so Total # of Beer Drinkers = 320/2 = 160
and Total Not BEER drinkers = 160
This does not lead us to how many drank neither because we don't know how many of the Total BEER drinkers also drank wine or who only drank beer.
Not sufficient
St2: Only Beer drinkers = Beer + Wine Drinkers
so # who drink Beer but Not Wine = 0
hence who drink neither = 120 - 0 = 120
SUFFICIENT

IMO B
Top
Join the discussion
Newbie | Next Rank: 10 Posts
Posts: 4
Joined: Sat Mar 30, 2013 9:24 am

by sjcl1526 » Sun Jun 02, 2013 6:39 am
How is this? I did not get this right.

Total # of Beer Drinkers = 320/2 = 160
and Total Not BEER drinkers = 160
Top
Join the discussion
User avatar
Master | Next Rank: 500 Posts
Posts: 357
Joined: Thu Apr 18, 2013 9:46 amFollowed by: 7 members
Location: Jeddah, Saudi Arabia
Thanked: 42 times
GMAT Score:730

by faraz_jeddah » Wed Jun 05, 2013 2:10 am
srcc25anu wrote:we know total wine drinkers = 200
so total NOT WINE drinkers = 320-200 = 120
ST1: Same no of beer drinkers as non drinkers
so Total # of Beer Drinkers = 320/2 = 160
and Total Not BEER drinkers = 160
This does not lead us to how many drank neither because we don't know how many of the Total BEER drinkers also drank wine or who only drank beer.
Not sufficient
St2: Only Beer drinkers = Beer + Wine Drinkers
so # who drink Beer but Not Wine = 0
hence who drink neither = 120 - 0 = 120
SUFFICIENT

IMO B
I think C is the Answer.

We both agree (1) is not suff.

So lets attack (2)
Only beer drinkers = BxNW
Beer and Wine = BxW
I have marked your mistake srcc25anu in red.

W NW
B x x = 2x
NB ? ? = ?
Total 200 120 = 320

There is no way you can find NBxNW
Top
Join the discussion
User avatar
Master | Next Rank: 500 Posts
Posts: 149
Joined: Wed May 01, 2013 10:37 pmFollowed by: 9 members
Thanked: 54 times

by Atekihcan » Wed Jun 05, 2013 3:57 am
Total (T) = Beer (B) + Wine (W) - Both (H) + None (N)
We need to determine N.

Now, T = 320 and W = 200

So, 320 = B + 200 - H + N
So, N = 320 - (B + 200 - H) = 120 - B + H

Statement 1: B = N
So, N = 120 - N + H
So, 2N = 120 + H

As we don't know H, we cannot determine N.
So, statement 1 is not sufficient.

Statement 2: Only beer = (B - H) = H
So, 2H = B
So, N = 120 - B + H
So, N = 120 - H

As we don't know H, we cannot determine N.
So, statement 2 is not sufficient.

Both statements together: 3N = 240
So, N = 80

So, both statements together is sufficient.

Answer : C
Top
Join the discussion

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 2095
Joined: Tue Dec 04, 2012 3:22 pmFollowed by: 247 members
Thanked: 1443 times

by ceilidh.erickson » Fri Jun 07, 2013 12:55 pm
I find that the best way to approach these Overlapping Sets problems is to set up a matrix:

Image

Now plug in the information from the first statement.

Image

Even if we carry all of the information through and create relationships, we can't get to a value for x:

Image

When we evaluate statement 2, we need to erase the information from statement 1 and consider it on its own:

Image

Again, we don't have enough information to get to a value for y, so we can't solve.

If we put the statements together, though, then we have enough information to solve for a value:

Image

The answer is C.
Ceilidh Erickson
EdM in Mind, Brain, and Education
Harvard Graduate School of Education
Top
Join the discussion

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 2095
Joined: Tue Dec 04, 2012 3:22 pmFollowed by: 247 members
Thanked: 1443 times

by ceilidh.erickson » Fri Jun 07, 2013 12:57 pm
For more on overlapping sets, see here: https://www.beatthegmat.com/survery-resu ... tml#576105
Ceilidh Erickson
EdM in Mind, Brain, and Education
Harvard Graduate School of Education
Top
Join the discussion
Senior | Next Rank: 100 Posts
Posts: 77
Joined: Tue Jul 31, 2012 6:53 amFollowed by: 1 member
Thanked: 8 times

by GaneshMalkar » Sun Jun 09, 2013 4:55 am
Atekihcan wrote:Total (T) = Beer (B) + Wine (W) - Both (H) + None (N)
We need to determine N.

Now, T = 320 and W = 200

So, 320 = B + 200 - H + N
So, N = 320 - (B + 200 - H) = 120 - B + H

Statement 1: B = N
So, N = 120 - N + H
So, 2N = 120 + H

As we don't know H, we cannot determine N.
So, statement 1 is not sufficient.

Statement 2: Only beer = (B - H) = H
So, 2H = B
So, N = 120 - B + H
So, N = 120 - H

As we don't know H, we cannot determine N.
So, statement 2 is not sufficient.

Both statements together: 3N = 240
So, N = 80

So, both statements together is sufficient.

Answer : C

I may be wrong in my understanding but the Question says "drank wine". So the bold above W = 200 shouldn't be W + B = 200; Since drank wine I interpreted as "not only Wine".
If you cant explain it simply you dont understand it well enough!!!
- Genius
Top
Join the discussion