Last visit was: 02 May 2026, 08:27 It is currently 02 May 2026, 08:27
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: 02 May 2026
Posts: 110,011
Own Kudos:
812,472
 [10]
Given Kudos: 105,986
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: 110,011
Kudos: 812,472
 [10]
For an entire class of students, the mean score on a test was 60, and 11 Mar 2020, 04:16
Kudos
Add Kudos
10
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
B
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:

84% (00:45) correct 16% (01:11) wrong based on 172 sessions

History

Date
Time
Result
Not Attempted Yet
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
ShowHide Answer
Official Answer
B
User avatar
GMATinsight
User avatar
Major Poster
Joined: 08 Jul 2010
Last visit: 01 May 2026
Posts: 6,999
Own Kudos:
16,948
Given Kudos: 128
Status:GMAT/GRE Tutor l Admission Consultant l On-Demand Course creator
Location: India
GMAT: QUANT+DI EXPERT
Schools: IIM (A) ISB '24
GMAT 1: 750 Q51 V41
WE:Education (Education)
Products:
My Reviews
Expert
Expert reply
Schools: IIM (A) ISB '24
GMAT 1: 750 Q51 V41
Posts: 6,999
Kudos: 16,948
For an entire class of students, the mean score on a test was 60, and 11 Mar 2020, 06:33
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
Show more

Mean = 60
SD = 15

M-2SD ≤ Elke's score ≤ M+2SD

60-30 ≤ Elke's score ≤ 60+30

30 ≤ Elke's score ≤ 90

Answer: Option B
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 17 Dec 2025
Posts: 5,902
Own Kudos:
5,460
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,902
Kudos: 5,460
For an entire class of students, the mean score on a test was 60, and 11 Mar 2020, 08:27
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
Show more
60 - 2*15 = 30 , Answer must be (B)
User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 01 May 2026
Posts: 22,310
Own Kudos:
26,563
Given Kudos: 302
Status:Founder & CEO
Affiliations: Target Test Prep
Location: United States (CA)
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 22,310
Kudos: 26,563
For an entire class of students, the mean score on a test was 60, and 14 Mar 2020, 10:03
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
Show more

The lowest score Eike could have received was 60 - 2 x 15 = 60 - 30 = 30.

Answer: B
User avatar
Kinshook
User avatar
Major Poster
Joined: 03 Jun 2019
Last visit: 02 May 2026
Posts: 5,992
Own Kudos:
5,865
Given Kudos: 163
Location: India
Schools: HBS '26 CBS '26 Wharton '26
GMAT 1: 690 Q50 V34
WE:Engineering (Transportation)
Products:
My Reviews
Schools: HBS '26 CBS '26 Wharton '26
GMAT 1: 690 Q50 V34
Posts: 5,992
Kudos: 5,865
For an entire class of students, the mean score on a test was 60, and 14 Mar 2020, 10:19
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
Show more

Lowest score = Mean - 2* standard deviation = 60 - 2*15 = 30

IMO B
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 39,003
Own Kudos:
1,122
Posts: 39,003
Kudos: 1,122
For an entire class of students, the mean score on a test was 60, and 23 Oct 2023, 11:42
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
110011 posts
Krunaal
Tuck School Moderator
852 posts