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

Redeem

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.

★★★★★5.0559 reviews
GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 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
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
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
GMATOnDemand Start 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 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

The ratio of the number of boys to the number of girls in

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 1622
Joined: Thu Mar 01, 2018 7:22 amFollowed by: 2 members
by Gmat_mission » Sat Mar 17, 2018 9:19 am
The ratio of the number of boys to the number of girls in a certain school club is 3 to 4. if there are 5 more girls than boys in the club, how many girls are in the club?

A. 7
B. 8
C. 12
D. 15
E. 20

[spoiler]OA=E[/spoiler].

What is the best approach that can be used to solve this PS question? Experts, I'd be thankful for your help.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |

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 Mar 17, 2018 5:14 pm
Gmat_mission wrote:The ratio of the number of boys to the number of girls in a certain school club is 3 to 4. if there are 5 more girls than boys in the club, how many girls are in the club?

A. 7
B. 8
C. 12
D. 15
E. 20
One approach:

The ratio of the number of boys to the number of girls in a certain school club is 3 to 4.
So, some possible scenarios are:

3 boys and 4 girls
6 boys and 8 girls
9 boys and 12 girls
.
.
.
There are 5 more girls than boys in the club
So, keep listing scenarios until we have 5 more girls than boys
.
.
12 boys and 16 girls (there are 4 more girls that boys)
15 boys and 20 girls (there are 5 more girls that boys) BINGO!!

Answer: E

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
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 Mar 17, 2018 5:16 pm
Gmat_mission wrote:The ratio of the number of boys to the number of girls in a certain school club is 3 to 4. if there are 5 more girls than boys in the club, how many girls are in the club?

A. 7
B. 8
C. 12
D. 15
E. 20
Another approach:

There are 5 more girls than boys in the club
Let G = # of girls in club
So G-5 = # of boys in club

The ratio of the number of boys to the number of girls in a certain school club is 3 to 4.
We can write (G-5)/G = 3/4
Cross multiply: 4(G-5) = 3G
Expand: 4G - 20 = 3G
Solve: G = 20

Answer: E

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
Elite Legendary Member
Posts: 10392
Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members
Location: Palo Alto, CA
Thanked: 2867 times
GMAT Score:800

by [email protected] » Sat Mar 17, 2018 7:03 pm
Hi Gmat_mission,

We're told that the ratio of the number of boys to the number of girls in a certain school club is 3 to 4 and that there are 5 more girls than boys in the club. We're asked for the number of girls in the club. This question can be solved in a variety of different ways, including by TESTing THE ANSWERS.

Since the ratio is 3 to 4, the number of boys is a multiple of 3 and the number of girls is an equivalent multiple of 4. Thus, the correct answer must be either B, C or E. In addition, for every 3 boys, there will be one additional girl. With a difference of 5, it's likely that the number of girls is also a multiple of 5. Let's TEST Answer E first.

Answer E: 20 girls
IF there are 20 girls - and 20 = (5)(4)....
there are (5)(3) = 15 boys
20 girls and 15 boys is a difference of 20 - 15 = 5 girls
This is an exact match for what we were told, so this must be the answer.

Final Answer: E

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 1462
Joined: Thu Apr 09, 2015 9:34 amFollowed by: 22 members
Location: New York, NY
Thanked: 39 times

by Jeff@TargetTestPrep » Wed Mar 21, 2018 3:26 pm
Gmat_mission wrote:The ratio of the number of boys to the number of girls in a certain school club is 3 to 4. if there are 5 more girls than boys in the club, how many girls are in the club?

A. 7
B. 8
C. 12
D. 15
E. 20
We can create the ratio boys : girls = 3x : 4x and create the equation:

3x + 5 = 4x

5 = x

So there are 4 x 5 = 20 girls in the club.

Answer: E

Jeffrey Miller
Head of GMAT Instruction
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1622
Joined: Thu Mar 01, 2018 7:22 amFollowed by: 2 members

by Gmat_mission » Sat Mar 24, 2018 4:38 am
Thank you all for your help.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1