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 table shows the results of a Mathematics test in a class

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Elite Legendary Member
Posts: 3991
Joined: Fri Jul 24, 2015 2:28 amFollowed by: 37 members
Location: Las Vegas, USA
Thanked: 19 times
by Max@Math Revolution » Fri Oct 18, 2019 1:42 am
[GMAT math practice question]

The table shows the results of a Mathematics test in a class. The test range of 20% of the students in that class is between 70~80. How many students are there in that class?

Image

A. 20
B. 23
C. 25
D. 26
E. 28
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Elite Legendary Member
Posts: 3991
Joined: Fri Jul 24, 2015 2:28 amFollowed by: 37 members
Location: Las Vegas, USA
Thanked: 19 times

by Max@Math Revolution » Sun Oct 20, 2019 5:50 pm
=>

If x is the number of students with scores between 70 and 80, then we have x/(x+20) = 20/100 or 100x = 20(x+20), and 100x = 20x+400.
Then we have 80x = 400.
So we have x = 5, and the total number of students is 5+20=25.

Therefore, C is the answer.
Answer: C
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 2539
Joined: Sun Oct 29, 2017 2:04 pmFollowed by: 6 members

by swerve » Wed Oct 23, 2019 6:05 am
Max@Math Revolution wrote:[GMAT math practice question]

The table shows the results of a Mathematics test in a class. The test range of 20% of the students in that class is between 70~80. How many students are there in that class?

Image

A. 20
B. 23
C. 25
D. 26
E. 28
\begin{align*}
\frac{x}{x}+20 &=\frac{1}{5} \\
5x&=x+20 \\
4x&=20 \\
x&=5.
\end{align*}

So, \(5+20=25\,\Rightarrow\) C
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1