It is currently 17 Oct 2017, 10:31

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

How many elements are there in Set A? 1) Frequency of each element in

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
SVP
SVP
User avatar
G
Joined: 08 Jul 2010
Posts: 1834

Kudos [?]: 2274 [0], given: 51

Location: India
GMAT: INSIGHT
WE: Education (Education)
Reviews Badge
How many elements are there in Set A? 1) Frequency of each element in [#permalink]

Show Tags

New post 05 Oct 2017, 07:08
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

47% (00:32) correct 53% (00:01) wrong based on 17 sessions

HideShow timer Statistics

How many elements are there in Set A?

1) Frequency of each element in the set A is 1
2) Standard Deviation of Set A is NOT Positive

Source: http://www.GMATinsight.com
[Reveal] Spoiler: OA

_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Kudos [?]: 2274 [0], given: 51

Senior Manager
Senior Manager
avatar
G
Joined: 25 Feb 2013
Posts: 385

Kudos [?]: 163 [0], given: 31

Location: India
GPA: 3.82
GMAT ToolKit User Reviews Badge
How many elements are there in Set A? 1) Frequency of each element in [#permalink]

Show Tags

New post 05 Oct 2017, 07:46
GMATinsight wrote:
How many elements are there in Set A?

1) Frequency of each element in the set A is 1
2) Standard Deviation of Set A is NOT Positive

Source: http://www.GMATinsight.com


Statement 1:set can be {1,2,3...} or {1}. in either case frequency is 1 but no of elements are different. Hence insufficient

Statement 2: implies St. Dvi is 0 because standard deviation cannot be negative, it is either positive or 0. Note standard deviation is the square root of variance, hence cannot be negative. so in Set A all elements are equal i.e {1,1,1,1....} or {1}. In either case no of elements are different. hence Insufficient

Combining 1 & 2,it is clear that the set A has only One element. Hence Sufficient

Option C

Kudos [?]: 163 [0], given: 31

How many elements are there in Set A? 1) Frequency of each element in   [#permalink] 05 Oct 2017, 07:46
Display posts from previous: Sort by

How many elements are there in Set A? 1) Frequency of each element in

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.