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OG2015 DS n, 15, 12, 9,

This topic has 1 expert reply and 0 member replies
lionsshare Senior | Next Rank: 100 Posts
Joined
09 Aug 2017
Posted:
62 messages

OG2015 DS n, 15, 12, 9,

Sat Sep 16, 2017 2:24 am
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.

OA: B

The statements are quite ambiguous to me. Anyone, please explain the solution to this problem. Thanks a bunch!

GMAT/MBA Expert

Jay@ManhattanReview GMAT Instructor
Joined
22 Aug 2016
Posted:
1026 messages
Followed by:
22 members
470
Sat Sep 16, 2017 4:52 am
lionsshare wrote:
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.

OA: B

The statements are quite ambiguous to me. Anyone, please explain the solution to this problem. Thanks a bunch!
Statement 1: n > 12

Certainly not helpful. n can have any value under the Sun. Insufficient.

Statement 2: The median of the numbers in the list is 13.

Since the statement refers to the median, we must first arrange the given list in an ascending order.

The arranged list in the ascending order: 9, 12, 15, 20; let's leave n for the time being.

Since there are five numbers in the set, the median would be the middle-most number, i.e., the third number. We know that median = 13, which is not among the given four numbers, n must be 13. Sufficient.

Hope this helps!

-Jay
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