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

It is currently 17 Oct 2018, 16:38

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

Was the average (arithmetic mean) of the temperature at noon in degree

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

Hide Tags

Manager
Manager
avatar
Joined: 11 Feb 2015
Posts: 107
GMAT 1: 710 Q48 V38
Was the average (arithmetic mean) of the temperature at noon in degree  [#permalink]

Show Tags

New post Updated on: 12 Oct 2015, 06:28
3
3
00:00
A
B
C
D
E

Difficulty:

  85% (hard)

Question Stats:

56% (02:22) correct 44% (02:13) wrong based on 204 sessions

HideShow timer Statistics

Was the average (arithmetic mean) of the temperature at noon in degrees Celsius in town A during the first 5 days of last month at least 28 degrees Celsius?

(1) The sum of the temperatures at noon in town A during the first 4 days was 116 degrees Celsius.

(2) The average of the temperatures at noon in town A during the second, third, fourth, and fifth days was 30 degrees Celsius.


My doubt below:-

the five elements are a,b, c ,d e,

a and b not suff clearly.

combining it could be 26 30 30 30 30 ... anyway greater than 140. even in I decrease value in middle places, I have to make sum of first 4 and last 4 as 116 and 120. overall sum will still be >146. Where am I going wrong ?

Thanks in advance.

Originally posted by rukna on 11 Oct 2015, 23:08.
Last edited by ENGRTOMBA2018 on 12 Oct 2015, 06:28, edited 1 time in total.
Formatted the question
Intern
Intern
avatar
B
Joined: 03 Aug 2014
Posts: 18
Re: Was the average (arithmetic mean) of the temperature at noon in degree  [#permalink]

Show Tags

New post 11 Oct 2015, 23:21
Temperature in Celsius can be as low as -273 deg C. i hope you get the solution now. just assume a really low value of temperature. both statements are not sufficient.
Manager
Manager
avatar
Joined: 11 Feb 2015
Posts: 107
GMAT 1: 710 Q48 V38
Re: Was the average (arithmetic mean) of the temperature at noon in degree  [#permalink]

Show Tags

New post 12 Oct 2015, 00:25
Mega1234 wrote:
Temperature in Celsius can be as low as -273 deg C. i hope you get the solution now. just assume a really low value of temperature. both statements are not sufficient.


but then wouldnt the other 4 values have to increase to match up to the average or sum ?
can you give an example of such set
Intern
Intern
avatar
Joined: 02 Oct 2015
Posts: 11
Re: Was the average (arithmetic mean) of the temperature at noon in degree  [#permalink]

Show Tags

New post 12 Oct 2015, 01:19
the thinking you are applying may suit in either increasing or decreasing set but here when any of the variable can have any possible values .
a1+a2+a3+a4=116
a2+a3+a4+a5=30*4=120,only possible result is a5-a1=4
now see a1,a2,a3,a4,a5 can take any value,no boundry whatsoever.so average doesn't matter at all
Current Student
avatar
S
Joined: 20 Mar 2014
Posts: 2633
Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE: Engineering (Aerospace and Defense)
GMAT ToolKit User Premium Member Reviews Badge
Re: Was the average (arithmetic mean) of the temperature at noon in degree  [#permalink]

Show Tags

New post 12 Oct 2015, 06:34
1
rukna wrote:
Was the average (arithmetic mean) of the temperature at noon in degrees Celsius in town A during the first 5 days of last month at least 28 degrees Celsius?

(1) The sum of the temperatures at noon in town A during the first 4 days was 116 degrees Celsius.

(2) The average of the temperatures at noon in town A during the second, third, fourth, and fifth days was 30 degrees Celsius.


My doubt below:-

the five elements are a,b, c ,d e,

a and b not suff clearly.

combining it could be 26 30 30 30 30 ... anyway greater than 140. even in I decrease value in middle places, I have to make sum of first 4 and last 4 as 116 and 120. overall sum will still be >146. Where am I going wrong ?

Thanks in advance.


Please follow posting guidelines (link in the signatures). Make sure to put your own analysis under spoiler or in another post.

As for your question,

Yes you can have a case such as 26,30,30,30,30 but you can also have a case of 4,40,40,32,8 satisfying the 2 statements at the same time but in the 2nd case, the average is <28.

You can recognize this from the given statements combined together, to get e-a=4. So once you get this information, you can have a big range of values that may or may not have average >28.

Hence E is the correct answer.

Hope this helps.
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 8442
Premium Member
Re: Was the average (arithmetic mean) of the temperature at noon in degree  [#permalink]

Show Tags

New post 20 Apr 2018, 23:45
Hello from the GMAT Club BumpBot!

Thanks to another GMAT 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.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Bot
Re: Was the average (arithmetic mean) of the temperature at noon in degree &nbs [#permalink] 20 Apr 2018, 23:45
Display posts from previous: Sort by

Was the average (arithmetic mean) of the temperature at noon in degree

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


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®.