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

It is currently 20 Nov 2018, 11:56

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 November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
  • All GMAT Club Tests are Free and open on November 22nd in celebration of Thanksgiving Day!

     November 22, 2018

     November 22, 2018

     10:00 PM PST

     11:00 PM PST

    Mark your calendars - All GMAT Club Tests are free and open November 22nd to celebrate Thanksgiving Day! Access will be available from 0:01 AM to 11:59 PM, Pacific Time (USA)
  • Free lesson on number properties

     November 23, 2018

     November 23, 2018

     10:00 PM PST

     11:00 PM PST

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

In a retail store, the average (arithmetic mean) sale for month M was

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

Hide Tags

Retired Moderator
User avatar
S
Joined: 18 Sep 2014
Posts: 1127
Location: India
GMAT ToolKit User Premium Member Reviews Badge
In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post Updated on: 16 Mar 2016, 07:53
2
7
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

61% (01:19) correct 39% (01:33) wrong based on 187 sessions

HideShow timer Statistics

In a retail store, the average (arithmetic mean) sale for month M was d dollars. Was the average (arithmetic mean) sale for month J at least 20 percent higher than that for month M?

(1) For month M, total revenue from sales was $3,500.
(2) For month J, total revenue from sales was $6,000.

In the solution, it is mentioned that

Quote:
This statement provides no information as to the number of sales so there is no way to determine the size of average scale.


My confusion is whether the fact that no of days of a month can be 28 or 30 or 31 is the main culprit or any other reason is present because of which we are not able to solve the problem.

Originally posted by Nevernevergiveup on 11 Sep 2015, 08:34.
Last edited by Nevernevergiveup on 16 Mar 2016, 07:53, edited 2 times in total.
RENAMED THE TOPIC.
Manager
Manager
avatar
Joined: 17 Aug 2015
Posts: 98
Location: India
Concentration: Strategy, General Management
Schools: Duke '19 (II)
GMAT 1: 750 Q49 V42
GPA: 4
WE: Information Technology (Investment Banking)
GMAT ToolKit User
Re: In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post 14 Sep 2015, 21:45
You are right. With the mean and no of days, you can count total sales.

Total sales = mean * no of days

However, in both cases, we have only total sales given. There's no way to find mean without no of days. So, both are together insufficient. Hence (E)
_________________

If you like this post, be kind and help me with Kudos!

Cheers!

Current Student
User avatar
Joined: 13 May 2011
Posts: 178
Concentration: Strategy, Technology
GMAT 1: 750 Q49 V42
GPA: 3.2
WE: Accounting (Consulting)
GMAT ToolKit User Premium Member Reviews Badge
Re: In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post 17 Nov 2015, 00:36
1
Mechmeera wrote:
In a retail store, the average (arithmetic mean) sale for month M was d dollars. Was the average (arithmetic mean) sale for month J at least 20 percent higher than that for month M?

(1) For month M, total revenue from sales was $3,500.
(2) For month J, total revenue from sales was $6,000.

In the solution, it is mentioned that

Quote:
This statement provides no information as to the number of sales so there is no way to determine the size of average scale.


My confusion is whether the fact that no of days of a month can be 28 or 30 or 31 is the main culprit or any other reason is present because of which we are not able to solve the problem.


Hi, that is not the reason. The question isn't talking about average daily sales, but about average sale amount. For example, there can be more than 1 sale per day, it could be that they had 100 sales in Month M and 1 sale in month J or vice versa. So the number of days per month is not the reason for answer E, its the number of sales that we need to know.
_________________

Stay positive! ^.^


My blog - http://www.mbafortech.com

Current Student
User avatar
Joined: 13 May 2011
Posts: 178
Concentration: Strategy, Technology
GMAT 1: 750 Q49 V42
GPA: 3.2
WE: Accounting (Consulting)
GMAT ToolKit User Premium Member Reviews Badge
Re: In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post 17 Nov 2015, 00:39
HardWorkBeatsAll wrote:
You are right. With the mean and no of days, you can count total sales.

Total sales = mean * no of days

However, in both cases, we have only total sales given. There's no way to find mean without no of days. So, both are together insufficient. Hence (E)


I highlighted the portion that I do not agree with.

Total sales = average sale * number of sales, not number of days.
_________________

Stay positive! ^.^


My blog - http://www.mbafortech.com

EMPOWERgmat Instructor
User avatar
V
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 12891
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Re: In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post 19 Nov 2015, 17:54
1
1
Hi Mechmeera,

Since the prompt focuses on the average SALE per month, we need to know the TOTAL revenue and the TOTAL number of sales (re: the total number of 'transactions'). The number of days in the month has NO impact on this question.

You'll notice that the nothing in the prompt ever describes the total number of transactions in either month M or month J, so there is no way to determine the average sale for either month (nor how those averages relate to one another).

Final Answer:

GMAT assassins aren't born, they're made,
Rich
_________________

760+: Learn What GMAT Assassins Do to Score at the Highest Levels
Contact Rich at: Rich.C@empowergmat.com

Rich Cohen

Co-Founder & GMAT Assassin

Special Offer: Save $75 + GMAT Club Tests Free
  Official GMAT Exam Packs + 70 Pt. Improvement Guarantee
www.empowergmat.com/

*****Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!*****

Senior Manager
Senior Manager
avatar
Joined: 23 Apr 2015
Posts: 309
Location: United States
Concentration: General Management, International Business
WE: Engineering (Consulting)
Re: In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post 25 Sep 2016, 15:48
sidoknowia wrote:
In a retail store, the average (arithmetic mean) sale for month M was d dollars.
Was the average (arithmetic mean) sale for month J at least 20 percent higher
than that for month M?
(1) For month M, total revenue from sales was $3,500.
(2) For month J, total revenue from sales was $6,000.

(A) Statement (1) ALONE is sufficient, but statement (2) alone is not
sufficient to answer the question asked
(B) Statement (2) ALONE is sufficient, but statement (1) alone is not
sufficient to answer the question asked
(C) BOTH statements (1) and (2) TOGETHER are sufficient to answer the
question asked, but NEITHER statement ALONE is sufficient
(D) EACH statement ALONE is sufficient to answer the question asked
(E) Statements (1) and (2) TOGETHER are NOT sufficient to answer the
question asked, and additional data are needed


Question is asking for comparison between Average Sale of Month M and Month J.
Average sale = \(\frac{Total Revenue from All Sales}{No. of Sales}\)
Neither of the options gives the No. of sales, so Answer is E.
EMPOWERgmat Instructor
User avatar
V
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 12891
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Re: In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post 25 Sep 2016, 19:10
Hi rakaisraka,

Since the prompt focuses on the average SALE per month, we need to know the TOTAL revenue and the TOTAL number of sales (re: the total number of 'transactions'). The number of days in the month has NO impact on this question.

You'll notice that the nothing in the prompt ever describes the total number of transactions in either month M or month J, so there is no way to determine the average sale for either month (nor how those averages relate to one another).

Final Answer:

GMAT assassins aren't born, they're made,
Rich
_________________

760+: Learn What GMAT Assassins Do to Score at the Highest Levels
Contact Rich at: Rich.C@empowergmat.com

Rich Cohen

Co-Founder & GMAT Assassin

Special Offer: Save $75 + GMAT Club Tests Free
  Official GMAT Exam Packs + 70 Pt. Improvement Guarantee
www.empowergmat.com/

*****Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!*****

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 8866
Premium Member
Re: In a retail store, the average (arithmetic mean) sale for month M was  [#permalink]

Show Tags

New post 22 Mar 2018, 06:16
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: In a retail store, the average (arithmetic mean) sale for month M was &nbs [#permalink] 22 Mar 2018, 06:16
Display posts from previous: Sort by

In a retail store, the average (arithmetic mean) sale for month M was

  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®.