Last visit was: 30 Dec 2024, 08:08 It is currently 30 Dec 2024, 08:08
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

GRE Prep 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 GRE 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
PREVIOUS TOPIC
NEXT TOPIC

Aaron’s first three quiz scores were 75, 84, and 82. If his

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

User avatar
sandy
Retired Moderator
Joined: 07 Jun 2014
Posts: 4815
Own Kudos [?]: 11278 [0]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post   29 Aug 2018, 16:26
Expert Reply
00:00

Question Stats:

97% (00:54) correct 2% (00:54) wrong based on 39 sessions

Hide Show timer Statistics

Aaron’s first three quiz scores were 75, 84, and 82. If his score on the fourth quiz reduced his average (arithmetic mean) quiz score to 74, what was his score on the fourth quiz?

Show: :: OA
55
avatar
Arc29
Intern
Intern
Joined: 10 Aug 2018
Posts: 29
Own Kudos [?]: 10 [0]
Given Kudos: 0
Send PM
Re: Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post   31 Aug 2018, 22:05
1
Answer is 55.
Since the sum of the first three is 241
Thus
241+x/3 = 74
which gives x=55
avatar
daina1323031
Manager
Manager
Joined: 10 Oct 2020
Posts: 113
Own Kudos [?]: 80 [1]
Given Kudos: 37
Send PM
Re: Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post   19 Dec 2020, 12:41
1
Average for the first three tests is = ( 75 + 84 + 82) / 3 = 241/3 = 80.33

average reduced = 80.33 - 74 = 6.33

Number for fourth test = 80.33 - 6.33 X 4 = 80.33 - 25.33= 55
avatar
Rajdas
Intern
Intern
Joined: 11 Feb 2021
Posts: 1
Own Kudos [?]: 2 [2]
Given Kudos: 4
Send PM
Re: Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post   21 Feb 2021, 19:32
2
Arc29 wrote:
Answer is 55.
Since the sum of the first three is 241
Thus
241+x/3 = 74
which gives x=55

It should be 241+X/4=74

Posted from my mobile device
User avatar
D
rx10
Retired Moderator
Joined: 02 Dec 2020
Posts: 1831
Own Kudos [?]: 2149 [1]
Given Kudos: 140
GRE 1: Q168 V157

GRE 2: Q167 V161
Send PM
Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post   21 Feb 2021, 19:58
1
Scores = 75 , 84 , 82
Sum of scores = 75+84+82 = 241

Now it is given that after adding the fourth quiz score the average reduced to 74

Let's take score of 4th quiz = x

Average = 74 = \(\frac{241+x}{4}\)

x = 55

Rajdas wrote:
Arc29 wrote:
Answer is 55.
Since the sum of the first three is 241
Thus
241+x/3 = 74
which gives x=55

It should be 241+X/4=74

Posted from my mobile device
avatar
Harshi95
Intern
Intern
Joined: 26 Jan 2021
Posts: 15
Own Kudos [?]: 10 [1]
Given Kudos: 6
Send PM
Re: Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post   22 Feb 2021, 02:20
1
The new average is 74.
therefore the mark scored in the last test- 75+84+82+X/ 4 =74

241+x/4= 74
x= (74*4)-241
x=55
User avatar
D
KarunMendiratta
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Own Kudos [?]: 3277 [1]
Given Kudos: 172
Location: India
WE:Education (Education)
Send PM
Re: Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post   22 Feb 2021, 09:39
1
sandy wrote:
Aaron’s first three quiz scores were 75, 84, and 82. If his score on the fourth quiz reduced his average (arithmetic mean) quiz score to 74, what was his score on the fourth quiz?

Show: :: OA
55


Another Approach:

Since the average on 4 tests is 74
Let us see the difference between the overall average and each score

\(75 - 74 = 1\)
\(84 - 74 = 10\)
\(82 - 74 = 8\)

i.e. he has 19 surplus of 74, so we must subtract it from 74
\(74 - 19 = 55\)
Prep Club for GRE Bot
gmatclubot
Re: Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink]
22 Feb 2021, 09:39
Moderators:
adewale223
GRE Instructor
88 posts
bronaugust
GRE Forum Moderator
37 posts
BrushMyQuant
Moderator
1116 posts
VibhuAnurag
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact