Last visit was: 24 Apr 2026, 19:24 It is currently 24 Apr 2026, 19:24
Home
Messages
Tests
Schools
Events
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
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 24 Apr 2026
Posts: 109,818
Own Kudos:
811,087
 [6]
Given Kudos: 105,873
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: 109,818
Kudos: 811,087
 [6]
In a certain stock portfolio with 500 shares of different stocks, the 26 Dec 2017, 00:18
Kudos
Add Kudos
6
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

15% (low)

Question Stats:

86% (01:50) correct 14% (02:18) wrong based on 123 sessions

History

Date
Time
Result
Not Attempted Yet
In a certain stock portfolio with 500 shares of different stocks, the average (arithmetic mean) value of a share of the stocks is $11. If the value of a share of one of the stocks, of which the portfolio contains 300 shares, decreases by $1 what will be the average value of the stocks in the portfolio?

A. $17.30
B. $10.90
C. $10.83
D. $10.40
E. $9.80
ShowHide Answer
Official Answer
D
User avatar
DavidTutorexamPAL
User avatar
examPAL Representative
Joined: 07 Dec 2017
Last visit: 09 Sep 2020
Posts: 1,002
Own Kudos:
2,042
 [3]
Given Kudos: 26
Posts: 1,002
Kudos: 2,042
 [3]
In a certain stock portfolio with 500 shares of different stocks, the 26 Dec 2017, 01:45
1
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
Bunuel
In a certain stock portfolio with 500 shares of different stocks, the average (arithmetic mean) value of a share of the stocks is $11. If the value of a share of one of the stocks, of which the portfolio contains 300 shares, decreases by $1 what will be the average value of the stocks in the portfolio?

A. $17.30
B. $10.90
C. $10.83
D. $10.40
E. $9.80
Show more

This is a question involving a ratio (between portfolios) and a percent increase (in stock value).
We'll solve it using the logic of ratios, a Logical approach.

300/500 shares = 3/5 of the portfolio decreased by $1.
Then we should expect the average price to decrease by 3/5 of $1 = $0.60
Our new price is 11 - 0.60 = $10.4
(D) is our answer.
avatar
Tranquil Focus
avatar
Joined: 14 Jun 2017
Last visit: 15 Mar 2020
Posts: 21
Own Kudos:
12
Given Kudos: 3
Location: United States
Schools: Kellogg PT '21 (A) Booth PT '21 (M)
GMAT 1: 710 Q48 V38
GPA: 2.8
Schools: Kellogg PT '21 (A) Booth PT '21 (M)
GMAT 1: 710 Q48 V38
Posts: 21
Kudos: 12
In a certain stock portfolio with 500 shares of different stocks, the 26 Dec 2017, 02:37
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In a certain stock portfolio with 500 shares of different stocks, the average (arithmetic mean) value of a share of the stocks is $11. If the value of a share of one of the stocks, of which the portfolio contains 300 shares, decreases by $1 what will be the average value of the stocks in the portfolio?

A. $17.30
B. $10.90
C. $10.83
D. $10.40
E. $9.80
Show more

We have 500 shares with average of $11. So total portfolio value\(= $11*500= $5,500\).
Value of 300 shares decreased by $1 so new portfolio value=\($5,500- $1*300= $5,200\).

New Average value of stocks= \($5,200/ 500= $10.40\). Hence D.
avatar
banuprakash
avatar
Joined: 25 Nov 2017
Last visit: 03 Dec 2019
Posts: 3
Own Kudos:
1
Posts: 3
Kudos: 1
In a certain stock portfolio with 500 shares of different stocks, the 26 Dec 2017, 02:49
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Mean 11 * 500=5500

New mean,

300*10+200*11=5200

5200/500= 10.4

And:d

Sent from my ZUK Z2131 using GMAT Club Forum mobile app
User avatar
exc4libur
User avatar
Joined: 24 Nov 2016
Last visit: 22 Mar 2022
Posts: 1,680
Own Kudos:
1,469
 [1]
Given Kudos: 607
Location: United States
Posts: 1,680
Kudos: 1,469
 [1]
In a certain stock portfolio with 500 shares of different stocks, the 27 Dec 2017, 05:43
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In a certain stock portfolio with 500 shares of different stocks, the average (arithmetic mean) value of a share of the stocks is $11. If the value of a share of one of the stocks, of which the portfolio contains 300 shares, decreases by $1 what will be the average value of the stocks in the portfolio?

A. $17.30
B. $10.90
C. $10.83
D. $10.40
E. $9.80
Show more

\(Average=\frac{Sum}{Quantity}\)

\(Average.Before=\frac{500*11}{500}=11\)

\(Average.After=\frac{500*11}{500}-\frac{300*1}{500}=11-\frac{3}{5}=10.40\)

(D) is the answer.
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 17 Dec 2025
Posts: 5,903
Own Kudos:
5,454
 [1]
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,903
Kudos: 5,454
 [1]
In a certain stock portfolio with 500 shares of different stocks, the 27 Dec 2017, 11:17
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In a certain stock portfolio with 500 shares of different stocks, the average (arithmetic mean) value of a share of the stocks is $11. If the value of a share of one of the stocks, of which the portfolio contains 300 shares, decreases by $1 what will be the average value of the stocks in the portfolio?

A. $17.30
B. $10.90
C. $10.83
D. $10.40
E. $9.80
Show more

Total value of 500 shares is $ 5500

Since the value of 300 shares, decreases by $1, net decrease in value is - $ 300

So, The effective total value of 500 shares is $ 5200

The average value of the stocks in the portfolio is = \(\frac{5200}{500}\) = \($ 10.4\)

Answer will be (D) \($10.40\)
User avatar
Archit3110
User avatar
Major Poster
Joined: 18 Aug 2017
Last visit: 24 Apr 2026
Posts: 8,629
Own Kudos:
5,190
Given Kudos: 243
Status:You learn more from failure than from success.
Location: India
Concentration: Sustainability, Marketing
GMAT Focus 1: 545 Q79 V79 DI73
GMAT Focus 2: 645 Q83 V82 DI81
GPA: 4
WE:Marketing (Energy)
Products:
GMAT Club Tests Forum Quiz
GMAT Focus 2: 645 Q83 V82 DI81
Posts: 8,629
Kudos: 5,190
In a certain stock portfolio with 500 shares of different stocks, the 13 Jan 2020, 00:12
Kudos
Add Kudos
Bookmarks
Bookmark this Post
current value of stocks = 500* 11; 5500
and of 300 stocks 1 $ ; 300 $
new value of 500 ; 5500-300 ; 5200 $
avg ; 5200/500 ; 10.4
IMO D


Bunuel
In a certain stock portfolio with 500 shares of different stocks, the average (arithmetic mean) value of a share of the stocks is $11. If the value of a share of one of the stocks, of which the portfolio contains 300 shares, decreases by $1 what will be the average value of the stocks in the portfolio?

A. $17.30
B. $10.90
C. $10.83
D. $10.40
E. $9.80
Show more
User avatar
AxiGe
User avatar
Joined: 04 Mar 2021
Last visit: 08 Mar 2023
Posts: 6
Own Kudos:
2
Given Kudos: 479
Posts: 6
Kudos: 2
In a certain stock portfolio with 500 shares of different stocks, the 16 Apr 2021, 19:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
The lost is of 300 can be distributed among the 500 shares (each one of them could be thought to worth 11 since that is the media). So:

300/500 = 3/5 = (1/5)*3 = (0.2)*3= 0.6 of lost per share

So:
New media : 11- 0.6= 10.40
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,976
Own Kudos:
1,117
Posts: 38,976
Kudos: 1,117
In a certain stock portfolio with 500 shares of different stocks, the 04 Nov 2025, 23:22
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderators:
Bunuel
Math Expert
109818 posts
Krunaal
Tuck School Moderator
853 posts