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 →

The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to women

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 7187
Joined: Thu Sep 07, 2017 4:43 pmFollowed by: 23 members
by BTGmoderatorDC » Tue Feb 11, 2020 1:50 am
The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to women after the drop out is 8 to 7, then how many men are currently in the class?

A. 14
B. 16
C. 18
D. 20
E. 22


OA C

Source: Princeton Review
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: 2623
Joined: Mon Jun 02, 2008 3:17 amFollowed by: 355 members
Location: Montreal
Thanked: 1090 times
GMAT Score:780

Re: The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to w

by Ian Stewart » Tue Feb 11, 2020 12:47 pm
If the ratio of men to women is 6 to 5, the number of men must be a multiple of 6. Only one answer is a multiple of 6, namely 18, so that has to be right.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

ianstewartgmat.com
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 2535
Joined: Sun Oct 29, 2017 2:04 pmFollowed by: 6 members

Re: The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to w

by swerve » Wed Feb 12, 2020 6:15 pm
BTGmoderatorDC wrote: ↑
Tue Feb 11, 2020 1:50 am
 The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to women after the drop out is 8 to 7, then how many men are currently in the class?

A. 14
B. 16
C. 18
D. 20
E. 22


OA C

Source: Princeton Review
Let men be \(m\) and women be \(w\) in the class

\begin{align*}
\dfrac{m}{w} &= \dfrac{6}{5} \\
5m &= 6w.
\end{align*}
Then
\begin{align*}
\dfrac{m-2}{w-1} &= \dfrac{8}{7} \\
7(m-2) &= 8(w-1) \\
7m - 14 &= 8w - 8 \\
7m - 6 &= 8\cdot \dfrac{5m}{6} \\
7m - 6 &= \dfrac{20m}{3} \\
21m - 18 &= 20m \\
m &= 18.
\end{align*}
Therefore, __C__
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8139
Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members
Location: Los Angeles, CA
Thanked: 43 times

Re: The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to w

by Scott@TargetTestPrep » Mon Feb 17, 2020 3:31 am
BTGmoderatorDC wrote: ↑
Tue Feb 11, 2020 1:50 am
 The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to women after the drop out is 8 to 7, then how many men are currently in the class?

A. 14
B. 16
C. 18
D. 20
E. 22


OA C

Source: Princeton Review
The ratio 6 : 5 can be re-expressed as 6x : 5x, where 6x is the number of men currently in the class and 5x is the number of women currently in the class.

We can create the equation:

(6x - 2) / (5x - 1) = 8/7

7(6x - 2) = 8(5x - 1)

42x - 14 = 40x - 8

2x = 6

x = 3

So, there are 6 * 3 = 18 men in the class.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

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