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 →

a data from gmatclub

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 1119
Joined: Fri May 07, 2010 8:50 amFollowed by: 3 members
Thanked: 29 times
by diebeatsthegmat » Fri May 06, 2011 11:22 am
Given a set {x, y, z}, if the first term in the data set above is 3, what is the third term?

(1) the range of this data set is 0

(2) the standard deviation of this data set is 0
i think the answer should be D.
statement 2 is obviously sufficient
statement 1: range=max-min=0 so max=min
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 582
Joined: Tue Mar 08, 2011 12:48 amFollowed by: 6 members
Thanked: 61 times
GMAT Score:740

by force5 » Fri May 06, 2011 12:13 pm
Seems like D for me too. i didn't understand what is your doubt?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1112
Joined: Sat Feb 26, 2011 11:16 amFollowed by: 49 members
Thanked: 77 times

by atulmangal » Fri May 06, 2011 8:33 pm
Ans has to be Op D only

its a general principal if Range is zero that means all the no's are equal
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1119
Joined: Fri May 07, 2010 8:50 amFollowed by: 3 members
Thanked: 29 times

by diebeatsthegmat » Mon May 09, 2011 9:08 am
force5 wrote:Seems like D for me too. i didn't understand what is your doubt?
because in the page i read, the answer is not D. thats why i asked
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1112
Joined: Sat Feb 26, 2011 11:16 amFollowed by: 49 members
Thanked: 77 times

by atulmangal » Mon May 09, 2011 9:51 am
diebeatsthegmat wrote:
force5 wrote:Seems like D for me too. i didn't understand what is your doubt?
because in the page i read, the answer is not D. thats why i asked
So what's the ans given on that page???
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

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

by Ian Stewart » Tue May 10, 2011 8:17 am
If the range is zero, the standard deviation is zero and vice versa; the two statements tell you the same thing. Further, if the range is zero, all the elements are equal, so the answer is certainly D.

The wording of the question is pretty awful. For one thing, sets are not ordered, so the question should not talk about the 'first element' or the 'third element' in the set (I don't know why it doesn't simply tell you that x=3 and ask for the value of z).
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
Post new topic Post Reply
• Page 1 of 1