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

It is currently 19 Apr 2019, 05:32

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

In a certain institute, every student studies at least one of two subj

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

Hide Tags

 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 54371
In a certain institute, every student studies at least one of two subj  [#permalink]

Show Tags

New post 10 Jul 2017, 04:27
1
6
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

59% (02:28) correct 41% (02:06) wrong based on 83 sessions

HideShow timer Statistics

In a certain institute, every student studies at least one of two subjects, Accountancy and Economics. What is the percentage of students who take only Economics?

(1) Out of every seven students taking Accountancy, three take Economics as well.
(2) For every three students taking at least one of the two courses, there is one student who takes up both.

_________________
Director
Director
avatar
S
Joined: 21 Mar 2016
Posts: 520
Reviews Badge
Re: In a certain institute, every student studies at least one of two subj  [#permalink]

Show Tags

New post 10 Jul 2017, 08:16
1
stat1 : for every seven students taking accountancy 3 take ecnomics as well..
consider the total to be 100,,hence 70 take accountancy
30 take eceonomics as well,, zero percent take only economics,, sufff

stat2 : no specific info on who is taking accountancy or economics,,not suff

ans A
Intern
Intern
avatar
B
Joined: 14 Nov 2012
Posts: 23
GMAT 1: 740 Q51 V38
Reviews Badge
Re: In a certain institute, every student studies at least one of two subj  [#permalink]

Show Tags

New post 04 Sep 2017, 03:00
2
Let me try with a solution (plz correct me if I'm wrong):

We have the ratio equation as below :
A-only + E-only + Both = 1

1. For every 7A, we have 3E
=> there are 4 who take A only
=> A-only ratio is 4/7
we dont know about E-only & Both ratio. Insufficient.

2."For every three students taking at least one of the two courses, there is one student who takes up both"
=> In another word, for every 3 students at the insitute, there is 1 who takes both.
=> Both ratio is 1/3
Insufficient.

(1+2) : we deduce that
E-only = 1 - 4/7 - 1/3

So C is the answer

Posted from my mobile device

Posted from my mobile device
GMAT Club Bot
Re: In a certain institute, every student studies at least one of two subj   [#permalink] 04 Sep 2017, 03:00
Display posts from previous: Sort by

In a certain institute, every student studies at least one of two subj

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


cron
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®.