Last visit was: 10 Jul 2025, 01:29 It is currently 10 Jul 2025, 01:29
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
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 10 July 2025
Posts: 102,612
Own Kudos:
739,974
 [7]
Given Kudos: 98,068
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: 102,612
Kudos: 739,974
 [7]
The average of John’s test scores in his economics class is 80%. Only 12 May 2020, 03:23
1
Kudos
Add Kudos
6
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

35% (medium)

Question Stats:

76% (02:12) correct 24% (01:59) wrong based on 114 sessions

History

Date
Time
Result
Not Attempted Yet
The average of John’s test scores in his economics class is 80%. Only one test remains, and it is weighted at 25% of the final grade. If his final grade is based entirely on his test scores, what is the lowest percent John can receive on the final to earn an 85% in the class?

A. 96%

B. 97%

C. 98%

D. 99%

E. 100%
ShowHide Answer
Official Answer
E
User avatar
GMATinsight
User avatar
Major Poster
Joined: 08 Jul 2010
Last visit: 09 Jul 2025
Posts: 6,375
Own Kudos:
15,569
 [2]
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
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Schools: IIM (A) ISB '24
GMAT 1: 750 Q51 V41
Posts: 6,375
Kudos: 15,569
 [2]
The average of John’s test scores in his economics class is 80%. Only 12 May 2020, 03:35
1
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Bunuel
The average of John’s test scores in his economics class is 80%. Only one test remains, and it is weighted at 25% of the final grade. If his final grade is based entirely on his test scores, what is the lowest percent John can receive on the final to earn an 85% in the class?

A. 96%

B. 97%

C. 98%

D. 99%

E. 100%

80*75 + x*25 = 85*100

i.e. x = 100

Answer: Option E

75 and 25 and 100 here are weightages
User avatar
GMATWhizTeam
User avatar
GMATWhiz Representative
Joined: 07 May 2019
Last visit: 03 Jul 2025
Posts: 3,384
Own Kudos:
2,072
 [2]
Given Kudos: 68
Location: India
GMAT 1: 740 Q50 V41
GMAT 2: 760 Q51 V40
Expert
Expert reply
GMAT 2: 760 Q51 V40
Posts: 3,384
Kudos: 2,072
 [2]
The average of John’s test scores in his economics class is 80%. Only 12 May 2020, 06:07
1
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Bunuel
The average of John’s test scores in his economics class is 80%. Only one test remains, and it is weighted at 25% of the final grade. If his final grade is based entirely on his test scores, what is the lowest percent John can receive on the final to earn an 85% in the class?

A. 96%

B. 97%

C. 98%

D. 99%

E. 100%

Solution


    • Let us assume that he got \(x\) % in the last test.
      o The weightage of this test \(= 25\)% \(= \frac{1}{4}\)
         So, weightage of the all other tests \(= \frac{3}{4}\)
    • He wants to earn an 85% in the class, So,
      o \(\frac{(80*\frac{3}{4}+ x*\frac{1}{4})}{1} = 85 ⟹ \frac{x}{4} = 25 ⟹ x = 100\)%
Thus, the correct answer is Option E.
avatar
RiseAndShinee
avatar
Joined: 08 May 2020
Last visit: 22 May 2021
Posts: 42
Own Kudos:
11
Given Kudos: 54
Posts: 42
Kudos: 11
The average of John’s test scores in his economics class is 80%. Only 12 May 2020, 06:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
The average of John’s test scores in his economics class is 80%. Only one test remains, and it is weighted at 25% of the final grade. If his final grade is based entirely on his test scores, what is the lowest percent John can receive on the final to earn an 85% in the class?

A. 96%

B. 97%

C. 98%

D. 99%

E. 100%

80% X 3 + x% x 1 = 85% x 4
Thus,
x% = 100%
User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 09 Jul 2025
Posts: 21,066
Own Kudos:
26,121
 [2]
Given Kudos: 296
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: 21,066
Kudos: 26,121
 [2]
The average of John’s test scores in his economics class is 80%. Only 01 Aug 2020, 06:53
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
The average of John’s test scores in his economics class is 80%. Only one test remains, and it is weighted at 25% of the final grade. If his final grade is based entirely on his test scores, what is the lowest percent John can receive on the final to earn an 85% in the class?

A. 96%

B. 97%

C. 98%

D. 99%

E. 100%
Solution:

Since 80, the average of his test scores (before the last test), represents 75% of the final grade, we can create the equation where s is the score of his last test:

0.75(80) + 0.25s = 85

60 + 0.25s = 85

0.25s = 25

s = 100

Answer: E
User avatar
adityasuresh
User avatar
Joined: 03 May 2020
Last visit: 08 May 2025
Posts: 107
Own Kudos:
44
Given Kudos: 512
Posts: 107
Kudos: 44
The average of John’s test scores in his economics class is 80%. Only 01 Feb 2023, 22:03
Kudos
Add Kudos
Bookmarks
Bookmark this Post
The average of John’s test scores in his economics class is 80%. Only one test remains, and it is weighted at 25% of the final grade. If his final grade is based entirely on his test scores, what is the lowest percent John can receive on the final to earn an 85% in the class?

A. 96%

B. 97%

C. 98%

D. 99%

E. 100%

I used weighted averages:
Aavg = 85
A1 = 80
A2 = ?
W1/W2 = 75/25 = A2 - 85/85-80 = A2 = 100%
E
Moderators:
Bunuel
Math Expert
102612 posts
Krunaal
PS Forum Moderator
683 posts