It is currently 21 Sep 2017, 16:30

### 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

# What is the value of n in the list above?

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 41666

Kudos [?]: 124360 [0], given: 12077

What is the value of n in the list above? [#permalink]

### Show Tags

13 Aug 2012, 07:17
Expert's post
3
This post was
BOOKMARKED
00:00

Difficulty:

5% (low)

Question Stats:

89% (00:34) correct 11% (00:39) wrong based on 1163 sessions

### HideShow timer Statistics

The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

n, 15, 12, 9, 20
What is the value of n in the list above?

(1) n> 12
(2) The median of the numbers in the list is 13.

Practice Questions
Question: 20
Page: 276
Difficulty: 550

GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

Each week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution.

We'll be glad if you participate in development of this project:
2. Please vote for the best solutions by pressing Kudos button;
3. Please vote for the questions themselves by pressing Kudos button;
4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.

Thank you!
[Reveal] Spoiler: OA

_________________

Kudos [?]: 124360 [0], given: 12077

Math Expert
Joined: 02 Sep 2009
Posts: 41666

Kudos [?]: 124360 [1], given: 12077

Re: What is the value of n in the list above? [#permalink]

### Show Tags

13 Aug 2012, 07:17
1
KUDOS
Expert's post
1
This post was
BOOKMARKED
SOLUTION

n, 15, 12, 9, 20
What is the value of n in the list above?

(1) n> 12. n can be any number greater than 12. Not sufficient.
(2) The median of the numbers in the list is 13. We have a list of five (odd) numbers. The median of a set with odd number of elements is the middle element (when arranged in ascending/descending order). Since, no other number in the list is 13, then n must 13. Sufficient.

_________________

Kudos [?]: 124360 [1], given: 12077

Senior Manager
Joined: 15 Jun 2010
Posts: 359

Kudos [?]: 440 [1], given: 50

Schools: IE'14, ISB'14, Kellogg'15
WE 1: 7 Yrs in Automobile (Commercial Vehicle industry)
Re: What is the value of n in the list above? [#permalink]

### Show Tags

13 Aug 2012, 07:30
1
KUDOS
IMO B:
1) Not sufficient n can take any value above 12.
2) Sufficient: n=13. All are distinct numbers and 2 values are below 13 and 2 values are above 13.
_________________

Regards
SD
-----------------------------
Press Kudos if you like my post.
Debrief 610-540-580-710(Long Journey): http://gmatclub.com/forum/from-600-540-580-710-finally-achieved-in-4th-attempt-142456.html

Kudos [?]: 440 [1], given: 50

Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 1525

Kudos [?]: 768 [1], given: 2

Location: United States (CA)
Re: What is the value of n in the list above? [#permalink]

### Show Tags

30 Jul 2016, 08:47
1
KUDOS
Expert's post
Bunuel wrote:
The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

n, 15, 12, 9, 20
What is the value of n in the list above?

(1) n> 12
(2) The median of the numbers in the list is 13.

We need to determine the value of n in the list: n, 15, 12, 9, 20.

Statement One Alone:

n > 12

Only knowing that n > 12 is not enough to determine the value of n. For example, n can be 13 or 14 (or some other number greater than 12). Statement one alone does not provide enough information to answer the question. We can eliminate answer choices A and D.

Statement Two Alone:

The median of the numbers in the list is 13.

We are given a list of 5 values: n, 15, 12, 9, and 20. Since we have 5 numbers in the list (an odd number of values), the median is equal to the middle value when the data are ordered from least to greatest. Using statement two, when the values are ordered from least to greatest, the list looks like the following:

9, 12, 13, 15, 20

Since 13 is not one of the four known values in the list, we see that 13 must be equal to n.

_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Kudos [?]: 768 [1], given: 2

Math Expert
Joined: 02 Sep 2009
Posts: 41666

Kudos [?]: 124360 [0], given: 12077

Re: What is the value of n in the list above? [#permalink]

### Show Tags

17 Aug 2012, 02:05
SOLUTION

n, 15, 12, 9, 20
What is the value of n in the list above?

(1) n> 12. n can be any number greater than 12. Not sufficient.
(2) The median of the numbers in the list is 13. We have a list of five (odd) numbers. The median of a set with odd number of elements is the middle element (when arranged in ascending/descending order). Since, no other number in the list is 13, then n must 13. Sufficient.

_________________

Kudos [?]: 124360 [0], given: 12077

GMAT Club Legend
Joined: 09 Sep 2013
Posts: 17587

Kudos [?]: 270 [0], given: 0

Re: What is the value of n in the list above? [#permalink]

### Show Tags

08 Oct 2014, 08:42
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Kudos [?]: 270 [0], given: 0

Manager
Joined: 18 Feb 2015
Posts: 90

Kudos [?]: 76 [0], given: 15

Re: What is the value of n in the list above? [#permalink]

### Show Tags

01 Sep 2015, 03:55
This might be a very easy question but the info in statement 2 is a bit ambiguous to me.

We have the following list of numbers and we don't know what is the value of "n".
n, 15, 12, 9, 20

As per statement 2, "The median of the numbers in the list is 13". If we arrange the numbers in the ascending order, there are two possibilities:

(1) 9,12,15,20,n (since we don't know what is the value of "n", it is possible that n is a large number)
(2) n, 9,12,15,20 (again we don't know what is the value of "n", "n" could be a small number)

In the first case, the medium is 15 and in the second case the medium is 12.

How come the second statement is sufficient to answer this question?

Kudos [?]: 76 [0], given: 15

Math Expert
Joined: 02 Sep 2009
Posts: 41666

Kudos [?]: 124360 [0], given: 12077

Re: What is the value of n in the list above? [#permalink]

### Show Tags

01 Sep 2015, 04:34
HarveyKlaus wrote:
This might be a very easy question but the info in statement 2 is a bit ambiguous to me.

We have the following list of numbers and we don't know what is the value of "n".
n, 15, 12, 9, 20

As per statement 2, "The median of the numbers in the list is 13". If we arrange the numbers in the ascending order, there are two possibilities:

(1) 9,12,15,20,n (since we don't know what is the value of "n", it is possible that n is a large number)
(2) n, 9,12,15,20 (again we don't know what is the value of "n", "n" could be a small number)

In the first case, the medium is 15 and in the second case the medium is 12.

How come the second statement is sufficient to answer this question?

The median of a set with odd number of elements is the middle element (when arranged in ascending/descending order). So, the median is one of the following 5 numbers: n, 15, 12, 9, or 20. (2) says that the median is 13 and since no number is 13 there then it must be n. Thus the set is {9, 12, n = 13, 15, 20}
_________________

Kudos [?]: 124360 [0], given: 12077

Intern
Joined: 10 Sep 2015
Posts: 18

Kudos [?]: 1 [0], given: 19

Re: What is the value of n in the list above? [#permalink]

### Show Tags

11 Sep 2015, 00:34
Statement 1: n can take any value above 12. not sufficient
Statement 2: n=13. All are distinct numbers and if arranged in increasing order makes it possible to solve the question

Hence B

Kudos [?]: 1 [0], given: 19

Re: What is the value of n in the list above?   [#permalink] 11 Sep 2015, 00:34
Similar topics Replies Last post
Similar
Topics:
15 What is the value of z in the triangle above? 8 17 Jul 2017, 08:25
1 What is the value of the expression above? 6 13 Feb 2017, 17:11
3 What is the value of the sum of a list of n odd integers? (1) n = 8 (2 5 22 Dec 2014, 08:08
8 For the list of numbers above, what is the range? 9 09 Jul 2017, 14:40
13 What is the value of n in the list above? 15 19 Aug 2017, 01:00
Display posts from previous: Sort by