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

It is currently 09 Dec 2018, 15:57

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 in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • Free GMAT Algebra Webinar

     December 09, 2018

     December 09, 2018

     07:00 AM PST

     09:00 AM PST

    Attend this Free Algebra Webinar and learn how to master Inequalities and Absolute Value problems on GMAT.
  • Free lesson on number properties

     December 10, 2018

     December 10, 2018

     10:00 PM PST

     11:00 PM PST

    Practice the one most important Quant section - Integer properties, and rapidly improve your skills.

If the list of integers from 1 to 10 is multiplied by 3, the median of

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

Hide Tags

Senior DS Moderator
User avatar
V
Joined: 27 Oct 2017
Posts: 1106
Location: India
Concentration: International Business, General Management
GPA: 3.64
WE: Business Development (Energy and Utilities)
Premium Member CAT Tests
If the list of integers from 1 to 10 is multiplied by 3, the median of  [#permalink]

Show Tags

New post 10 Aug 2018, 07:27
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

90% (01:13) correct 10% (02:37) wrong based on 21 sessions

HideShow timer Statistics

If the list of integers from 1 to 10 is multiplied by 3, the median of the new list will be how many times the average of that new list?
A. \(\frac{1}{3}\)
B. 1
C. 3
D. 9
E. 27

_________________

Win GMAT CLUB Test- Weekly Quant Quiz Contest
Weekly Quant Quiz Questions- Direct Download
SC: Confusable words

All you need for Quant, GMAT PS Question Directory,GMAT DS Question Directory
Error log/Key Concepts
Combination Concept: Division into groups
Question of the Day (QOTD)
Free GMAT CATS

Senior SC Moderator
avatar
V
Joined: 22 May 2016
Posts: 2196
Premium Member CAT Tests
If the list of integers from 1 to 10 is multiplied by 3, the median of  [#permalink]

Show Tags

New post 10 Aug 2018, 08:09
gmatbusters wrote:
If the list of integers from 1 to 10 is multiplied by 3, the median of the new list will be how many times the average of that new list?
A. \(\frac{1}{3}\)
B. 1
C. 3
D. 9
E. 27

In an evenly spaced sequence,
Median = mean

Multiplying each term of an evenly spaced sequence (integers from 1 to 10) by the same number (3) produces another evenly spaced sequence.

The integers from 1 to 10 are evenly spaced consecutive integers.

The integers from 3 to 30 are evenly spaced consecutive multiples of 3.

In an evenly spaced sequence, the median equals the mean.

The median of the new list is how many times the average of that list?

Med = mean
\(\frac{Med}{mean}=1\)

Answer B


No need to do these calculations, but if unsure:
MEDIAN of new sequence = average of two middle terms
3, 6, 9, 12, 15, 16.5 18, 21, 24, 27, 30
MEAN of new sequence = \(\frac{First+ Last}{2}=\frac{3+30}{2}=16.5\)
You could also use the integers from 1 to 10, because "median = mean" applies to all evenly spaced sequences
Median: \(6.5\)
MEAN: \(\frac{(1 + 10)}{2} = \frac{11}{2} = 6.5\)
Median = (MEAN * 1)
GMAT Club Bot
If the list of integers from 1 to 10 is multiplied by 3, the median of &nbs [#permalink] 10 Aug 2018, 08:09
Display posts from previous: Sort by

If the list of integers from 1 to 10 is multiplied by 3, the median of

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


cron
Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.