BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

Each of people voted once in an election, X

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 46
Joined: Fri Oct 11, 2013 5:42 am
Thanked: 4 times
by canbtg » Sat Nov 02, 2013 6:31 am
Each of people voted once in an election, X got 483 from male voters, Y got 433 from female voters. How many votes did X get?
1) X got votes from 50% of male voters
2) Y got votes from 60% of female voters

OAB
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

Each of people voted once in an election, X

by Brent@GMATPrepNow » Sat Nov 02, 2013 8:06 am
canbtg wrote:Each of people voted once in an election, X got 483 from male voters, Y got 433 from female voters. How many votes did X get?

1) X got votes from 50% of male voters
2) Y got votes from 60% of female voters
We can use the Double Matrix Method here to help us arrange our information. The Double Matrix can be used for most questions featuring a population in which each member has two characteristics associated with it.
Here, we have a population of voters, and the two characteristics are:
- male or female
- voted for X or voted for Y

So, we can set up out diagram as follows:
Image

X got 483 from male voters, Y got 433 from female voters.
We can add that information as follows:
Image

Target question: How many votes did X get?
Notice that the two blue boxes represent the males and females who voted for X.
Image
So, our goal here is to find the sum of these two boxes.

Statement 1: X got votes from 50% of male voters
The two highlighted boxes represent the male voters. If 50% of them voted for X, then the other 50% voted for Y.
Image


So, 483 of the males also voted for Y...
Image

We can now see that we don't have enough information to find the sum of the values in the 2 blue boxes
Image

As such, statement 1 is NOT SUFFICIENT


Statement 2: Y got votes from 60% of female voters
The two highlighted boxes represent the female voters.
Image
Let's let F = the total number of female voters.
If 60% of the females voted for Y, then we can write 0.6F = 433
If we wanted to, we COULD solve this equation for F, at which point we COULD ALSO determine the number of females who voted for X.
Since we COULD determine the number of females who voted for X, then we COULD ALSO find the total number of people who voted for X
Image
Since we could easily answer the target question with certainty, statement 2 is SUFFICIENT

Answer: B

To learn more about the Double Matrix Method , watch our free video: https://www.gmatprepnow.com/module/gmat- ... ems?id=919

Then try these additional practice questions that can be solved using the Double Matrix Method:
- https://www.beatthegmat.com/mba/2011/05/ ... question-1
- https://www.beatthegmat.com/mba/2011/05/ ... question-2
- https://www.beatthegmat.com/mba/2011/05/ ... question-3
- https://www.beatthegmat.com/ds-quest-t187706.html
- https://www.beatthegmat.com/overlapping- ... 83320.html
- https://www.beatthegmat.com/finance-majo ... 67425.html
- https://www.beatthegmat.com/ds-french-ja ... 22297.html
- https://www.beatthegmat.com/sets-t269449.html#692540
- https://www.beatthegmat.com/in-costume-f ... tml#692116

Cheers,
Brent
Last edited by Brent@GMATPrepNow on Wed May 16, 2018 4:25 am, edited 2 times in total.
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 46
Joined: Fri Oct 11, 2013 5:42 am
Thanked: 4 times

by canbtg » Sat Nov 02, 2013 8:18 am
thanks Brent . The question is from GMATPREP QP .
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Sat Nov 02, 2013 8:42 am
canbtg wrote:thanks Brent . The question is from GMATPREP QP .
Hmmm, if it's an official GMATPrep question then either I'm missing something totally basic, or the question was not transcribed correctly. Here's why:

Let's let F = the total number of female voters.
It is given that 433 of the females voted for Y
Statement 2 say that 60% of the females voted for Y.
This mean that we can write 0.6F = 433
So, F = 433/0.6 = 721 2/3
This doesn't make any sense. We can't have 721 2/3 females.

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 46
Joined: Fri Oct 11, 2013 5:42 am
Thanked: 4 times

by canbtg » Sat Nov 02, 2013 3:01 pm
Brent@GMATPrepNow wrote:
canbtg wrote:thanks Brent . The question is from GMATPREP QP .
Hmmm, if it's an official GMATPrep question then either I'm missing something totally basic, or the question was not transcribed correctly. Here's why:

Let's let F = the total number of female voters.
It is given that 433 of the females voted for Y
Statement 2 say that 60% of the females voted for Y.
This mean that we can write 0.6F = 433
So, F = 433/0.6 = 721 2/3
This doesn't make any sense. We can't have 721 2/3 females.

Cheers,
Brent
I get your point . This is from some online resource tagged with GMATPREP Question (totally , misleading) . SO , I am sorry for creating a confusion .

I could Actually trace the original GMAT question :

Each vote in a certain election went to one of the two candidates, X or Y. Candidate X received 624 of the votes cast by men , and candidate Y received 483 of the votes cast by women , how many votes did X receive?
A. Candidate X got 50% of the votes cast by men.
B. Candidate Y got 60% of the votes cast by women.


OA
B
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Sat Nov 02, 2013 3:48 pm
Good work.
483 works much better.

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 518
Joined: Tue May 12, 2015 8:25 pm
Thanked: 10 times

by nikhilgmat31 » Thu Oct 08, 2015 10:06 pm
Does the new statements mean

1. Candidate X got 50% of the votes cast by men. = x got 50% of votes from men
2. Candidate Y got 60% of the votes cast by women. = y got 60 % of votes from women

1- In this case X got 624 votes from men so total votes X got = 624 * 2 = 1248 - SUFFICIENT

2. In this case Y got 483 votes from women so 60% of Y = 483 gives Y = 805 - NOT SUFFICIENT.

Answer should be A
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1