It is currently 23 Oct 2017, 03:22

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the value of x in 10, 13, 15, 17, and x? 1) The median of them

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

Hide Tags

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4155

Kudos [?]: 2918 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
What is the value of x in 10, 13, 15, 17, and x? 1) The median of them [#permalink]

Show Tags

New post 06 Sep 2017, 01:30
Expert's post
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

58% (00:53) correct 42% (00:37) wrong based on 45 sessions

HideShow timer Statistics

[GMAT math practice question]

What is the value of x in 10, 13, 15, 17, and x?

1) The median of them is 15
2) The range of them is 7
[Reveal] Spoiler: OA

_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2918 [0], given: 0

Manager
Manager
User avatar
S
Joined: 27 Dec 2016
Posts: 156

Kudos [?]: 38 [0], given: 192

Concentration: Social Entrepreneurship, Nonprofit
GPA: 3.65
WE: Sales (Consumer Products)
Premium Member CAT Tests
Re: What is the value of x in 10, 13, 15, 17, and x? 1) The median of them [#permalink]

Show Tags

New post 06 Sep 2017, 03:14
MathRevolution wrote:
[GMAT math practice question]

What is the value of x in 10, 13, 15, 17, and x?

1) The median of them is 15
2) The range of them is 7


I answered it wrong :oops: :oops: :oops: but suddenly realized my mistake.

The number is {x,10,13,15,17} (not in an order), and we must answer what is X?

#Statement 1
- Median 15 makes the set become like this : {10,13,15,17,x} or {10,13,15,x,17}.
- INSUFFICIENT.

#Statement 2
- The range of them is 7 - clearly INSUFFICIENT.

#Statement 1 & 2
- We have 2 option : {10,13,15,17,x} or {10,13,15,x,17}.
- Combine with statement 2, X can be 17 (from the first set) or 15/16/17 (from the second set).

E.
_________________

There's an app for that - Steve Jobs.

Kudos [?]: 38 [0], given: 192

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4155

Kudos [?]: 2918 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: What is the value of x in 10, 13, 15, 17, and x? 1) The median of them [#permalink]

Show Tags

New post 08 Sep 2017, 00:59
[GMAT math practice question]

=>

1) & 2) x = 16, x = 17
We have two solutions. The answer is not unique.
This is not sufficient.

Thus the answer is E.
Ans: E
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2918 [0], given: 0

Re: What is the value of x in 10, 13, 15, 17, and x? 1) The median of them   [#permalink] 08 Sep 2017, 00:59
Display posts from previous: Sort by

What is the value of x in 10, 13, 15, 17, and x? 1) The median of them

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


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.