Find all School-related info fast with the new School-Specific MBA Forum

It is currently 13 Jul 2014, 12:59

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Gmatclub question M18-11

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Status: faciendo quod indiget fieri
Joined: 13 Mar 2012
Posts: 88
Followers: 0

Kudos [?]: 21 [0], given: 4

Gmatclub question M18-11 [#permalink] New post 09 Nov 2012, 23:45
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

75% (01:11) correct 25% (01:31) wrong based on 4 sessions
If set S={2,5,1,x,7}, what is x ?

(1) The range of set S is 8

(2) The median of set S is 2



The answer given is : C

cant x take different values such as : 1.1, 1.2 , 1.3... and hence answer should be E ?

For answer to be c , should it not be mentioned that its an integer set?

I hope i am not missing something.
[Reveal] Spoiler: OA
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 18523
Followers: 3197

Kudos [?]: 21425 [0], given: 2547

Re: Gmatclub question M18-11 [#permalink] New post 10 Nov 2012, 04:18
Expert's post
adineo wrote:
If set S={2,5,1,x,7}, what is x ?

(1) The range of set S is 8

(2) The median of set S is 2

The answer given is : C

cant x take different values such as : 1.1, 1.2 , 1.3... and hence answer should be E ?

For answer to be c , should it not be mentioned that its an integer set?

I hope i am not missing something.


If set S={2,5,1,x,7}, what is x ?

(1) The range of set S is 8. The range of a set is the difference between the largest and smallest elements of the set. Now, since the range is 8, then either x=9 (in this case the largest element is x=9 and the smallest element is 1 --> range=9-1=8) or x=-1 (in this case the largest element is 7 and the smallest element is x=-1 --> range=7-(-1)=8). Not sufficient.

(2) The median of set S is 2. The median of a set with odd number of elements is just the middle element, when arranged in ascending/descending order. So, this statement implies that x\leq{2}. Not sufficient.

(1)+(2) Since from (2) x\leq{2}, then from (1) x=-1. Sufficient.

Answer: C.

Hope it's clear.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Manager
Manager
avatar
Joined: 28 Feb 2012
Posts: 115
Concentration: Strategy, International Business
Schools: INSEAD Jan '13
GPA: 3.9
WE: Marketing (Other)
Followers: 0

Kudos [?]: 15 [0], given: 17

GMAT ToolKit User
Re: Gmatclub question M18-11 [#permalink] New post 13 Nov 2012, 04:30
adineo wrote:
If set S={2,5,1,x,7}, what is x ?

(1) The range of set S is 8

(2) The median of set S is 2



The answer given is : C

cant x take different values such as : 1.1, 1.2 , 1.3... and hence answer should be E ?

For answer to be c , should it not be mentioned that its an integer set?

I hope i am not missing something.


I think there is no need to write that it is an integer, because x can take fractional values, but no fractional value could be found if both statements taken together. For example you cannot find a fractional number with which you can have the range of 8 in the set with the biggest number 7.

I hope that helps.
_________________

If you found my post useful and/or interesting - you are welcome to give kudos!

Re: Gmatclub question M18-11   [#permalink] 13 Nov 2012, 04:30
    Similar topics Author Replies Last post
Similar
Topics:
GMATClub 600-level questions pratikrossonero 2 30 Jun 2013, 01:50
questions re GMATclub tests Matt1177 2 19 Jan 2011, 06:05
4 Experts publish their posts in the topic Gmatclub test sc question Ayrish 5 13 Sep 2009, 07:02
Gmatclub Test Question thailandvc 2 07 Sep 2009, 02:28
Experts publish their posts in the topic Question about Gmatclub tests CasperMonday 3 06 Sep 2009, 03:04
Display posts from previous: Sort by

Gmatclub question M18-11

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: WoundedTiger, Bunuel



GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.