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

 It is currently 02 Jul 2015, 16:29

### 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

# The mean of set S is 20. What is the median of set S? 1. In

Author Message
TAGS:
VP
Joined: 22 Nov 2007
Posts: 1104
Followers: 8

Kudos [?]: 215 [0], given: 0

The mean of set S is 20. What is the median of set S? 1. In [#permalink]  16 Feb 2008, 09:08
1
This post was
BOOKMARKED
The mean of set S is 20. What is the median of set S?
1. In set S there are as many numbers bigger than 20 as there are numbers smaller than 20
2. All numbers in set S are even integers
SVP
Joined: 29 Aug 2007
Posts: 2493
Followers: 59

Kudos [?]: 576 [0], given: 19

Re: tricky statistics [#permalink]  16 Feb 2008, 18:37
marcodonzelli wrote:
The mean of set S is 20. What is the median of set S?

1. In set S there are as many numbers bigger than 20 as there are numbers smaller than 20
2. All numbers in set S are even integers

A. Median is 20 as it is in the middle.
_________________
Manager
Joined: 28 Dec 2007
Posts: 132
Schools: Stanford R1, Wharton R1 w/int, Chicago R1, HBS R2
Followers: 3

Kudos [?]: 32 [0], given: 1

Re: tricky statistics [#permalink]  16 Feb 2008, 18:52
(1) It is possible that this could imply the median is 20 (and therefore known): i.e. S={17,18,19,21,22,23} median=20
But it is also possible that it could be something else: i.e. S= {2,5,12,21,22,23} median =(12+21)/2=33/2
Not suff.

(2) All numbers in S are even...definitely not suff. by itself.

(1) U (2): there are an equal number of even integers less than 20 and even integers greater than 20 in S.
ex. 1 S={16,18,22,24) median =20
ex. 2 S={2,4,22,24} median = (4+22)/2 = 13
Not suff.

I think it's (E).
SVP
Joined: 29 Aug 2007
Posts: 2493
Followers: 59

Kudos [?]: 576 [0], given: 19

Re: tricky statistics [#permalink]  16 Feb 2008, 20:00
jankynoname wrote:
(1)  It is possible that this could imply the median is 20 (and therefore known):  i.e. S={17,18,19,21,22,23}  median=20     But it is also possible that it could be something else:  i.e. S= {2,5,12,21,22,23} median =(12+21)/2=33/2   Not suff.

(2)  All numbers in S are even...definitely not suff. by itself.  (1) U (2):  there are an equal number of even integers less than 20 and even integers greater than 20 in S.              ex. 1 S={16,18,22,24) median =20              ex. 2 S={2,4,22,24} median = (4+22)/2 = 13        Not suff.I think it's (E).

yup. you are correct.

_________________
Re: tricky statistics   [#permalink] 16 Feb 2008, 20:00
Similar topics Replies Last post
Similar
Topics:
When median = mean, is the set always evenly spaced? 2 17 Nov 2013, 21:31
1 What is the median of set s = (a-b,b-a,a+b) ? 1:The mean of 9 18 Oct 2008, 07:30
The mean of set S is 20. What is the median of set S? 1. In 4 14 May 2008, 02:15
1 Set S = If the mean is a+b, what is the median 4 31 Jan 2008, 12:21
If the median of a nonempty set is negative, is the mean 7 13 Dec 2007, 13:50
Display posts from previous: Sort by