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

 It is currently 19 Jan 2019, 10:46

### 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

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

## Events & Promotions

###### Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### FREE Quant Workshop by e-GMAT!

January 20, 2019

January 20, 2019

07:00 AM PST

07:00 AM PST

Get personalized insights on how to achieve your Target Quant Score.
• ### Free GMAT Strategy Webinar

January 19, 2019

January 19, 2019

07:00 AM PST

09:00 AM PST

Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

# The Financial News Daily has 25 reporters covering Asia, 20

Author Message
TAGS:

### Hide Tags

Manager
Joined: 05 Oct 2008
Posts: 243
The Financial News Daily has 25 reporters covering Asia, 20  [#permalink]

### Show Tags

02 Oct 2009, 23:30
2
00:00

Difficulty:

(N/A)

Question Stats:

57% (01:09) correct 43% (01:49) wrong based on 19 sessions

### HideShow timer Statistics

The Financial News Daily has 25 reporters covering Asia, 20 covering Europe, and 20 covering North America. Four reporters cover only Asia and Europe, 6 reporters cover only Asia and North America, and 7 reporters cover only Europe and North America. The Financial News Daily has 38 reporters in total covering Asia, Europe, and North America. How many reporters cover Asia, Europe, and North America?

Don't have the answer choices to this question.
Manager
Joined: 13 Jul 2006
Posts: 56

### Show Tags

03 Oct 2009, 03:49
In 3 overlapping zone/number questions, remember:

total = sum of (Asia only + Europe only + NorthAmerica only) + 2*(AsiaEurope+AsiaNorth+EuropeNorth) + 3*(AsiaEuropeNorth)

Solving for AsiaEuropeNorth, you will get 4.
_________________

Consider kudos for a good explanation

Math Expert
Joined: 02 Sep 2009
Posts: 52294

### Show Tags

03 Oct 2009, 06:56
1
study wrote:
The Financial News Daily has 25 reporters covering Asia, 20 covering Europe, and 20 covering North America. Four reporters cover only Asia and Europe, 6 reporters cover only Asia and North America, and 7 reporters cover only Europe and North America. The Financial News Daily has 38 reporters in total covering Asia, Europe, and North America. How many reporters cover Asia, Europe, and North America?

Don't have the answer choices to this question.

Total=38=25(Asia)+20(Europe)+20(America)-4(Asia and Europe)-6(Asia and America)-7(Europe and America)-2x(x is Asia, Europe and America, twice as the x was counted 3 times, so we should deduct 2x) --> x=5
_________________
Intern
Joined: 07 Oct 2011
Posts: 28

### Show Tags

09 Nov 2011, 09:37
what is the answer here? 5 or 10??
Intern
Joined: 14 Jun 2015
Posts: 1
Location: United States
WE: Securities Sales and Trading (Investment Banking)
Re: The Financial News Daily has 25 reporters covering Asia, 20  [#permalink]

### Show Tags

30 Jul 2015, 06:36
Bunuel wrote:
study wrote:
The Financial News Daily has 25 reporters covering Asia, 20 covering Europe, and 20 covering North America. Four reporters cover only Asia and Europe, 6 reporters cover only Asia and North America, and 7 reporters cover only Europe and North America. The Financial News Daily has 38 reporters in total covering Asia, Europe, and North America. How many reporters cover Asia, Europe, and North America?

Don't have the answer choices to this question.

Total=38=25(Asia)+20(Europe)+20(America)-4(Asia and Europe)-6(Asia and America)-7(Europe and America)-2x(x is Asia, Europe and America, twice as the x was counted 3 times, so we should deduct 2x) --> x=5

The answer is truly 5, the only number that can complete for 38 total as the question stem, Bunuel is correct but I just can't understand how to get this result.

Can you explain the reason why you put the "-2x" in the formula. "Twice as the x was counted 3 times, so we should deduct 2x".

Thanks
Math Expert
Joined: 02 Sep 2009
Posts: 52294
Re: The Financial News Daily has 25 reporters covering Asia, 20  [#permalink]

### Show Tags

30 Jul 2015, 06:39
AlexandreFBelo wrote:
Bunuel wrote:
study wrote:
The Financial News Daily has 25 reporters covering Asia, 20 covering Europe, and 20 covering North America. Four reporters cover only Asia and Europe, 6 reporters cover only Asia and North America, and 7 reporters cover only Europe and North America. The Financial News Daily has 38 reporters in total covering Asia, Europe, and North America. How many reporters cover Asia, Europe, and North America?

Don't have the answer choices to this question.

Total=38=25(Asia)+20(Europe)+20(America)-4(Asia and Europe)-6(Asia and America)-7(Europe and America)-2x(x is Asia, Europe and America, twice as the x was counted 3 times, so we should deduct 2x) --> x=5

The answer is truly 5, the only number that can complete for 38 total as the question stem, Bunuel is correct but I just can't understand how to get this result.

Can you explain the reason why you put the "-2x" in the formula. "Twice as the x was counted 3 times, so we should deduct 2x".

Thanks

Hope this helps.
_________________
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 6815
GMAT 1: 760 Q51 V42
GPA: 3.82
Re: The Financial News Daily has 25 reporters covering Asia, 20  [#permalink]

### Show Tags

28 Dec 2015, 11:33
Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and independent equations ensures a solution.

The Financial News Daily has 25 reporters covering Asia, 20 covering Europe, and 20 covering North America. Four reporters cover Asia and Europe but not North America, 6 reporters cover Asia and North America but not Europe, and 7 reporters cover Europe and North America but not Asia. How many reporters cover all of the 3 continents (Asia, Europe, and North America)?

(1) The Financial News Daily has 38 reporters in total covering at least 1 of the following continents: Asia, Europe, and North America.
(2) There are more Financial News Daily reporters covering only Asia than there are Financial News Daily reporters covering only North America.

If we modify the original condition and the question, we can get a diagram like below (and we can continue from there).

For cases where we need 1 more equation, such as original conditions with “1 variable”, or “2 variables and 1 equation”, or “3 variables and 2 equations”, we have 1 equation each in both 1) and 2). Therefore, there is 59 % chance that D is the answer, while A or B has 38% chance and C or E has 3% chance. Since D is most likely to be the answer using 1) and 2) separately according to DS definition. Obviously there may be cases where the answer is A, B, C or E.
Attachments

20151228_025648.jpg [ 1.87 MiB | Viewed 1679 times ]

20151228_025657.jpg [ 1.75 MiB | Viewed 1678 times ]

20151228_025711.jpg [ 1.74 MiB | Viewed 1681 times ]

_________________

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.
"Only \$149 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"

Non-Human User
Joined: 09 Sep 2013
Posts: 9449
Re: The Financial News Daily has 25 reporters covering Asia, 20  [#permalink]

### Show Tags

25 Dec 2017, 11:00
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.
_________________
Re: The Financial News Daily has 25 reporters covering Asia, 20 &nbs [#permalink] 25 Dec 2017, 11:00
Display posts from previous: Sort by