GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 17 Aug 2019, 08:12

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.

Close

Request Expert Reply

Confirm Cancel

M70-38

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 57022
M70-38  [#permalink]

Show Tags

New post 04 Sep 2018, 02:40
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

82% (01:47) correct 18% (01:07) wrong based on 11 sessions

HideShow timer Statistics

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 57022
Re M70-38  [#permalink]

Show Tags

New post 04 Sep 2018, 02:40
Official Solution:


We’ll go for LOGICAL because that is our first choice in Data Sufficiency.

We’ll begin by looking at the sequence and checking which integers, when added, can be medians: 9, 10 and 11 all work. (1) tells us \(x\) is definitely one of these numbers, and thus it must be the median. (B), (C) and (E) are eliminated. (2) Using the average, we’d be able to find \(x\) (\(\frac{previous \ sum + x}{7}\)), and thus we’d be able to tell whether \(x\) is the median. (A) is eliminated.


Answer: D
_________________
Intern
Intern
avatar
Joined: 28 Oct 2018
Posts: 1
Re: M70-38  [#permalink]

Show Tags

New post 30 Oct 2018, 08:45
Can some one explain to me how 1 and 2 are both sufficient?

I under stand 1. the options would be 9-10-11 and all three work and would be the median if added to the sequence.

but with 2, x=13 ((57+x)/7=10) which is greater than 11 from the prior answer and would not be the median?

How can x be equal to both: 9-10-11 and 13?
Senior Manager
Senior Manager
User avatar
G
Joined: 09 Aug 2017
Posts: 401
Re: M70-38  [#permalink]

Show Tags

New post 01 Nov 2018, 09:33
Statement 2,
(X +57)/7= 10
X= 13
but after inserting 13 in given series, median will change.
It is not D.
A is correct.
Intern
Intern
avatar
B
Joined: 20 May 2018
Posts: 1
GMAT 1: 600 Q38 V34
Reviews Badge
Re M70-38  [#permalink]

Show Tags

New post 27 Nov 2018, 18:23
I think this is a poor-quality question and I don't agree with the explanation.
Manager
Manager
avatar
S
Joined: 12 Mar 2019
Posts: 95
Re: M70-38  [#permalink]

Show Tags

New post 10 Aug 2019, 10:36
gvij2017 wrote:
Statement 2,
(X +57)/7= 10
X= 13
but after inserting 13 in given series, median will change.
It is not D.
A is correct.



We don't need to find median, we just need to tell if X will be a median, Answer is NO, As NO is also an answer, so St 2 is sufficient.
So answer is D
Manager
Manager
avatar
S
Joined: 12 Mar 2019
Posts: 95
Re: M70-38  [#permalink]

Show Tags

New post 10 Aug 2019, 10:37
ReevT wrote:
I think this is a poor-quality question and I don't agree with the explanation.



Can you please tell what makes it poor quality, so that your doubts can be cleared.
GMAT Club Bot
Re: M70-38   [#permalink] 10 Aug 2019, 10:37
Display posts from previous: Sort by

M70-38

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, Bunuel






cron

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