It is currently 25 Jun 2017, 20:55

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# gmat prep ds standard deviation

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 03 Apr 2006
Posts: 46
gmat prep ds standard deviation [#permalink]

### Show Tags

12 Jun 2007, 10:10
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

List S and list T each contain 5 positive integers and for each list the avg (mean) of the integers in the list is 40. if the integers 30,40 and 50 are in both list , is the standard deviation of the integers in list S greater than the list standard deviation of the integers in list T?

(1) the integer 25 is in list S
(2) the integer 45 is in the list
Intern
Joined: 31 May 2007
Posts: 6

### Show Tags

12 Jun 2007, 12:11
My choice "B"

From (1) we get no info. about List T
From (2) Assuming you meant to say that 45 is in both the lists. Then there is only one choice left for the 5th no. and it is 35 (to get the avg. 40)
The std. dev would be the same.
Intern
Joined: 03 Apr 2006
Posts: 46

### Show Tags

12 Jun 2007, 13:01
I'm sorry, I ment to say

List S and list T each contain 5 positive integers and for each list the avg (mean) of the integers in the list is 40. if the integers 30,40 and 50 are in both list , is the standard deviation of the integers in list S greater than the list standard deviation of the integers in list T?

(1) the integer 25 is in list S
(2) the integer 45 is in the list T

sorry
Manager
Joined: 25 May 2006
Posts: 227

### Show Tags

12 Jun 2007, 13:42
I believe is C

_________________

Who is John Galt?

12 Jun 2007, 13:42
Display posts from previous: Sort by

# gmat prep ds standard deviation

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.