Last visit was: 18 Nov 2025, 21:06 It is currently 18 Nov 2025, 21:06
Home
GMAT
Messages
Tests
Schools
Events
Rewards
Chat
My Profile
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
jlgdr
User avatar
Joined: 06 Sep 2013
Last visit: 24 Jul 2015
Posts: 1,311
Own Kudos:
2,863
 [5]
Given Kudos: 355
Concentration: Finance
Schools: Wharton '17 (A) HBS '17 (WA$)
Schools: Wharton '17 (A) HBS '17 (WA$)
Posts: 1,311
Kudos: 2,863
 [5]
What is the average (arithmetic mean) of the numbers 15, 16, 17 Sep 2013, 17:34
2
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

95% (00:39) correct 5% (00:48) wrong based on 789 sessions

History

Date
Time
Result
Not Attempted Yet
What is the average (arithmetic mean) of the numbers 15, 16, 17, 17, 18, and 19?

(A) 14.2
(B) 16.5
(C) 17
(D) 17.5
(E) 18
ShowHide Answer
Official Answer
C
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 18 Nov 2025
Posts: 105,355
Own Kudos:
778,092
 [4]
Given Kudos: 99,964
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 105,355
Kudos: 778,092
 [4]
What is the average (arithmetic mean) of the numbers 15, 16, 17 Sep 2013, 18:56
2
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
jlgdr
What is the average (arithmetic mean) of the numbers 15, 16, 17, 17, 18, and 19?

(A) 14.2
(B) 16.5
(C) 17
(D) 17.5
(E) 18
Show more

{15, 16, 17, 17, 18, 19}={17-2, 17-1, 17, 17, 17+1, 17+2} --> the average = 17.

Answer: C.
avatar
jajupreetam
avatar
Joined: 27 Jun 2013
Last visit: 14 Oct 2013
Posts: 1
Own Kudos:
1
 [1]
Given Kudos: 3
Posts: 1
Kudos: 1
 [1]
What is the average (arithmetic mean) of the numbers 15, 16, 18 Sep 2013, 04:14
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
The average of 15,16,17,18,19 ( sequence numbers) is 17 & now average of 17 & 17(remaining digit from given list) is 17 . Hence answer is 17.
User avatar
jlgdr
User avatar
Joined: 06 Sep 2013
Last visit: 24 Jul 2015
Posts: 1,311
Own Kudos:
2,863
Given Kudos: 355
Concentration: Finance
Schools: Wharton '17 (A) HBS '17 (WA$)
Schools: Wharton '17 (A) HBS '17 (WA$)
Posts: 1,311
Kudos: 2,863
What is the average (arithmetic mean) of the numbers 15, 16, 18 Sep 2013, 04:34
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Is it valid to average a part of the set and then reaverage at leisure?

Thanks

Posted from my mobile device
User avatar
rhine29388
User avatar
Joined: 24 Nov 2015
Last visit: 21 Oct 2019
Posts: 393
Own Kudos:
145
Given Kudos: 231
Location: United States (LA)
Products:
My Reviews
Posts: 393
Kudos: 145
What is the average (arithmetic mean) of the numbers 15, 16, 04 Jun 2016, 04:22
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Average = Sum/# of entities = 102/6 = 17
correct answer - C
User avatar
stonecold
User avatar
Joined: 12 Aug 2015
Last visit: 09 Apr 2024
Posts: 2,244
Own Kudos:
3,549
Given Kudos: 893
Schools: Boston U '20 (M)
GRE 1: Q169 V154
Schools: Boston U '20 (M)
GRE 1: Q169 V154
Posts: 2,244
Kudos: 3,549
What is the average (arithmetic mean) of the numbers 15, 16, 10 Dec 2016, 06:27
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Here is what i did in this Question -->

Mean of 15, 16, 17, 18, 19 being an AP series will be its median => 17
Now if we add a 17 => Mean would not change.
Hence Mean ==> 17

Hence C
User avatar
errorlogger
User avatar
Joined: 01 Nov 2020
Last visit: 31 Jan 2022
Posts: 82
Own Kudos:
86
Given Kudos: 52
Posts: 82
Kudos: 86
What is the average (arithmetic mean) of the numbers 15, 16, 10 Apr 2021, 05:34
Kudos
Add Kudos
Bookmarks
Bookmark this Post
jlgdr
What is the average (arithmetic mean) of the numbers 15, 16, 17, 17, 18, and 19?

(A) 14.2
(B) 16.5
(C) 17
(D) 17.5
(E) 18
Show more

In a consecutive set of numbers, mean = median

Median = (17+17)/2 = 34/2 = 17
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,587
Own Kudos:
1,079
Posts: 38,587
Kudos: 1,079
What is the average (arithmetic mean) of the numbers 15, 16, 20 May 2025, 08:49
Kudos
Add Kudos
Bookmarks
Bookmark this Post
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.
Moderators:
Bunuel
Math Expert
105355 posts
Krunaal
Tuck School Moderator
805 posts