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 →

If the ratio of the number of teachers to the number of . .

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 2058
Joined: Sun Oct 29, 2017 4:24 amFollowed by: 5 members
Thanked: 1 times
by M7MBA » Sat Dec 30, 2017 7:28 am
If the ratio of the number of teachers to the number of students is the same in School District M and School District P, what is the ratio of the number of students in School District M to the number of students in School District P ?

(1) There are 10,000 more students in School District M than there are in School District P.
(2) The ratio of the number of teachers to the number of students in School District M is 1 to 20.

The OA is the option E.

Can any expert help me here? I am confused. I don't know how could I solve this DS question.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |

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] » Thu Jan 04, 2018 10:53 am
Hi M7MBA,

We're told that the ratio of the number of teachers to the number of students is the SAME in School District M and School District P. We're asked for the ratio of the number of STUDENTS in School District M to the number of STUDENTS in School District P. This question can be solved by TESTing VALUES.

1) There are 10,000 more students in School District M than there are in School District P.

IF....
Students in M = 20,000
Students in P = 10,000
Then the ratio is 20,000:10,000 = 2:1

IF....
Students in M = 15,000
Students in P = 5,000
Then the ratio is 15,000:5,000 = 3:1
Fact 1 is INSUFFICIENT.

2) The ratio of the number of teachers to the number of students in School District M is 1 to 20.

Fact 2 tells us nothing about the number of teachers or students in District P.
Fact 2 is INSUFFICIENT.

Combined, we already have two TESTs that fit both Facts:
IF....
Teachers in M = 1,000
Students in M = 20,000
Students in P = 10,000
Then the ratio is 20,000:10,000 = 2:1

IF....
Teachers in M = 750
Students in M = 15,000
Students in P = 5,000
Then the ratio is 15,000:5,000 = 3:1
Combined, INSUFFICIENT

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
Post new topic Post Reply
• Page 1 of 1