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

It is currently 23 Oct 2019, 15:34

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

For the 5 days shown in the graph, how many kilowatt-hours greater was

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

Hide Tags

Find Similar Topics 
Manager
Manager
User avatar
B
Joined: 23 Jun 2009
Posts: 173
Location: Brazil
GMAT 1: 470 Q30 V20
GMAT 2: 620 Q42 V33
GMAT ToolKit User
For the 5 days shown in the graph, how many kilowatt-hours greater was  [#permalink]

Show Tags

New post 13 Jan 2017, 10:50
7
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

79% (01:20) correct 21% (01:24) wrong based on 217 sessions

HideShow timer Statistics

Image
For the 5 days shown in the graph, how many kilowatt-hours greater was the median daily electricity use than the average (arithmetic mean) daily electricity use?

A) 1
B) 2
C) 3
D) 4
E) 5

Attachment:
daily.JPG
daily.JPG [ 17.29 KiB | Viewed 6301 times ]
VP
VP
User avatar
D
Joined: 05 Mar 2015
Posts: 1000
Reviews Badge
Re: For the 5 days shown in the graph, how many kilowatt-hours greater was  [#permalink]

Show Tags

New post 13 Jan 2017, 20:23
felippemed wrote:
For the 5 days shown in the graph, how many kilowatt-hours greater was the median daily electricity use than the average (arithmetic mean) daily electricity use?

A) 1
B) 2
C) 3
D) 4
E) 5


well the median is =27 from set (19,24,27,29,31)
and mean is (31+29+27+24+19)/5 =26
thus difference =27-26 =1
Ans A
Board of Directors
User avatar
D
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4784
Location: India
GPA: 3.5
WE: Business Development (Commercial Banking)
GMAT ToolKit User
Re: For the 5 days shown in the graph, how many kilowatt-hours greater was  [#permalink]

Show Tags

New post 14 Jan 2017, 00:20
felippemed wrote:
For the 5 days shown in the graph, how many kilowatt-hours greater was the median daily electricity use than the average (arithmetic mean) daily electricity use?

A) 1
B) 2
C) 3
D) 4
E) 5


Median Data \(= { 19 , 24 , 27 , 29 , 31 }\) & \(Median = 27\)

Mean= \(\frac{( 31 + 27 + 29 + 24 + 19 )}{5} = 26\)

Difference between Median and Mean = 27 - 26 => 1

Hence, answer will be (A) 1

_________________
Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )
Retired Moderator
avatar
P
Joined: 17 Jun 2016
Posts: 499
Location: India
GMAT 1: 720 Q49 V39
GMAT 2: 710 Q50 V37
GPA: 3.65
WE: Engineering (Energy and Utilities)
GMAT ToolKit User Reviews Badge
Re: For the 5 days shown in the graph, how many kilowatt-hours greater was  [#permalink]

Show Tags

New post 08 May 2017, 02:07
Median of 19, 24, 27, 29 and 31 is 27 (middle value in the list)

Mean = (19+24+27+29+31) / 5 = 130/5 = 26

Difference = 27-26 = 1
_________________
Senior Manager
Senior Manager
User avatar
P
Joined: 07 Jul 2012
Posts: 366
Location: India
Concentration: Finance, Accounting
GPA: 3.5
Re: For the 5 days shown in the graph, how many kilowatt-hours greater was  [#permalink]

Show Tags

New post 09 May 2017, 00:07
To find the Median, first of all arrange the data in ascending or descending order

(19,24,27,29,31) Median value is the middle value of the series

Median = 27

Mean= \(\frac{(19+24+27+29+31)}{5}\)= 26

Difference between Median and Mean = 27 - 26= 1

Answer: A.

Kudos please if you like my explanation!
_________________
Kindly hit kudos if my post helps!
IIMA, IIMC School Moderator
User avatar
V
Joined: 04 Sep 2016
Posts: 1366
Location: India
WE: Engineering (Other)
CAT Tests
Re: For the 5 days shown in the graph, how many kilowatt-hours greater was  [#permalink]

Show Tags

New post 30 Sep 2017, 10:12
1
Abhishek009 VeritasPrepKarishma Bunuel Engr2012


Quote:
Mean= \(\frac{( 31 + 27 + 29 + 24 + 19 )}{5} = 26\)



There is no shortcut to this? for eg: for AP, ,mean = \(\frac{(first term + last term)}{2}\)
Target Test Prep Representative
User avatar
D
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 8137
Location: United States (CA)
Re: For the 5 days shown in the graph, how many kilowatt-hours greater was  [#permalink]

Show Tags

New post 08 Mar 2019, 08:06
felippemed wrote:
For the 5 days shown in the graph, how many kilowatt-hours greater was the median daily electricity use than the average (arithmetic mean) daily electricity use?

A) 1
B) 2
C) 3
D) 4
E) 5



Listing the numbers from smallest to largest, we have: 19, 24, 27, 29 and 31. So 27 is the median. The average is (19 + 24 + 27 + 29 + 31)/5 = 130/5 = 26. Therefore, the median exceeds the average by 1.

Answer: A
_________________

Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
TTP - Target Test Prep Logo
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

GMAT Club Bot
Re: For the 5 days shown in the graph, how many kilowatt-hours greater was   [#permalink] 08 Mar 2019, 08:06
Display posts from previous: Sort by

For the 5 days shown in the graph, how many kilowatt-hours greater was

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





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