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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Retired Moderator
Joined: 19 Nov 2020
Posts: 326
Given Kudos: 64
GRE 1: Q160 V152
If the mean of set A {918,273,645,331; 918,273,645,320; 918,273,64
[#permalink]
29 Jul 2021, 11:15
29 Jul 2021, 11:15
00:00
Question Stats:
100% (03:00) correct
0% (00:00) wrong based on 5 sessions
Hide Show timer Statistics
If the mean of set A {918,273,645,331; 918,273,645,320; 918,273,645,301; 918,273,645,421; x} is 918,273,645,321, what is the value of x?
(A) 918,273,645,221
(B) 918,273,645,231
(C) 918,273,645,232
(D) 918,273,645,241
(E) 918,273,645,242
Please do not use excell, or online calculator. This question is supposed to test not your calculator skills, GRE calculator will not fit this number BTW
(A) 918,273,645,221
(B) 918,273,645,231
(C) 918,273,645,232
(D) 918,273,645,241
(E) 918,273,645,242
Please do not use excell, or online calculator. This question is supposed to test not your calculator skills, GRE calculator will not fit this number BTW
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Given Kudos: 172
Location: India
WE:Education (Education)
Re: If the mean of set A {918,273,645,331; 918,273,645,320; 918,273,64
[#permalink]
29 Jul 2021, 20:53
29 Jul 2021, 20:53
1
1
Bookmarks
motion2020 wrote:
If the mean of set A {918,273,645,331; 918,273,645,320; 918,273,645,301; 918,273,645,421; x} is 918,273,645,321, what is the value of x?
(A) 918,273,645,221
(B) 918,273,645,231
(C) 918,273,645,232
(D) 918,273,645,241
(E) 918,273,645,242
Please do not use excell, or online calculator. This question is supposed to test not your calculator skills, GRE calculator will not fit this number BTW
(A) 918,273,645,221
(B) 918,273,645,231
(C) 918,273,645,232
(D) 918,273,645,241
(E) 918,273,645,242
Please do not use excell, or online calculator. This question is supposed to test not your calculator skills, GRE calculator will not fit this number BTW
918,273,645,331; 918,273,645,320; 918,273,645,301; 918,273,645,421; x
For simplicity, let us assume 918,273,645 as \(A\)
Now the numbers are A,331; A,320; A,301; A,421; x
Approach 1:
Given; \(\frac{A,331 + A,320 + A,301 + A,421 + x}{5} = A,321\)
\(A,331 + A,320 + A,301 + A,421 + x = 5(A,321)\)
\(A,1373 +x = A,1605\)
\(x = A,1605 - A,1373\)
\(x = A,232\)
Approach 2: Using a Number line
Since, the mean is A,321 - it should lie in the centre
Calculate the difference between the numbers
A,301 = 20 to left
A,320 = 1 to left
A,331, = 10 to right
A,421 = 100 to right
Overall chance = 89 to right
To maintain the balance, the new number should be 89 to the left i.e. A,321 - A,089 = A,232
Hence, option C
Attachments
If the mean of set A.png [ 5.42 KiB | Viewed 1382 times ]
General Discussion
Re: If the mean of set A {918,273,645,331; 918,273,645,320; 918,273,64
[#permalink]
11 Mar 2023, 03:32
11 Mar 2023, 03:32
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep 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.
Thanks to another GRE Prep 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.
