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

It is currently 15 Oct 2019, 20:22

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

A group of students is preparing for Reading Comprehension, 70% of the

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

Hide Tags

Find Similar Topics 
Manager
Manager
User avatar
G
Joined: 13 May 2017
Posts: 114
Location: Finland
Concentration: Accounting, Entrepreneurship
GMAT 1: 530 Q42 V22
GMAT 2: 570 Q36 V31
GMAT 3: 600 Q42 V28
GPA: 3.14
WE: Account Management (Entertainment and Sports)
Reviews Badge
A group of students is preparing for Reading Comprehension, 70% of the  [#permalink]

Show Tags

New post 03 Feb 2019, 11:41
1
1
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

62% (01:38) correct 38% (01:26) wrong based on 34 sessions

HideShow timer Statistics

A group of students is preparing for Reading Comprehension, 70% of the students read frequently The Economist and 60% of the students read frequently the Wall Street Journal to get better at Reading Comprehension. What percentage of all the students in the group don't read frequently either of the two journals?

1. There are 80 students in the group.
2. 40% of the students read frequently both journals.
NUS School Moderator
avatar
V
Joined: 18 Jul 2018
Posts: 1024
Location: India
Concentration: Finance, Marketing
WE: Engineering (Energy and Utilities)
Reviews Badge
Re: A group of students is preparing for Reading Comprehension, 70% of the  [#permalink]

Show Tags

New post 03 Feb 2019, 20:10
The Economist - 70%
Wall street journal - 60%
Neither = ?

From statement 1:

The total number of students is given, but no info about how many people read both.
Hence 1 is insufficient.

From statement 2:

40% of students read both the articles.

100% = 70+60-40+Neither
Neither = 10%
Statement 2 is Sufficient.

B is the answer.
_________________
Press +1 Kudos If my post helps!
Target Test Prep Representative
User avatar
P
Status: Chief Curriculum and Content Architect
Affiliations: Target Test Prep
Joined: 24 Nov 2014
Posts: 618
GMAT 1: 800 Q51 V51
Re: A group of students is preparing for Reading Comprehension, 70% of the  [#permalink]

Show Tags

New post 05 Feb 2019, 10:04
rencsee wrote:
A group of students is preparing for Reading Comprehension, 70% of the students read frequently The Economist and 60% of the students read frequently the Wall Street Journal to get better at Reading Comprehension. What percentage of all the students in the group don't read frequently either of the two journals?

1. There are 80 students in the group.
2. 40% of the students read frequently both journals.


Information given:

70% of the students read The Economist.

60% of the students read the Wall Street Journal.

These percentages will be the same no matter how many students there are.

If there are 100 students:

70 students read the Economist.

60 students read the Wall Street Journal.

If there are 50 students:

35 students read the Economist.

30 students read the Wall Street Journal.

The number of students does not affect the percentages, it only affects the absolute number that each percentage represents.

Question:

What percentage of all the students in the group don't read frequently either of the two journals?

Statement 1: There are 80 students in the group.

Since we have only percentage information, this answer has no effect on our ability to determine what percentage of students do not read either.

For example we could have:

70% of 80 = 56 read the Economist.

60% of 80 = 48 read the Wall Street Journal.

4 read both.

0 read neither.

or we could have:

70% of 80 = 56 read the Economist.

60% of 80 = 48 read the Wall Street Journal.

All of the people who read the Economist read the Wall Street Journal as well. So, 48 read both.

24 read neither.

Insufficient.

Statement 2: 40% of the students read frequently both journals.

With this information we can tell how much overlap there is between the percentage of students who read the Economist and the percentage who read the Wall Street Journal.

This overlap in percentage terms will be the same regardless of the number of students.

If there are 100 students:

70 students read the Economist.

60 students read the Wall Street Journal.

40% of 100 = 40 read both.

So the overlap is 40 students.

A + B - Both + Neither = Total

70 + 60 - 40 + Neither = 100

Neither = 10

10/100 = 10%

If there are 50 students:

35 students read the Economist.

30 students read the Wall Street Journal.

40% of 50 = 20 read both.

So the overlap is 20 students.

A + B - Both + Neither = Total

35 + 30 - 20 + Neither = 50

Neither = 5

5/50 = 10%

For any number of students, the Neither percentage will be 10%.

Sufficient.

The correct answer is (B).
_________________

Marty Murray

Chief Curriculum and Content Architect

Marty@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: A group of students is preparing for Reading Comprehension, 70% of the   [#permalink] 05 Feb 2019, 10:04
Display posts from previous: Sort by

A group of students is preparing for Reading Comprehension, 70% of the

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





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