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

It is currently 21 Jan 2019, 01:55

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 January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • GMAT Club Tests are Free & Open for Martin Luther King Jr.'s Birthday!

     January 21, 2019

     January 21, 2019

     10:00 PM PST

     11:00 PM PST

    Mark your calendars - All GMAT Club Tests are free and open January 21st for celebrate Martin Luther King Jr.'s Birthday.
  • The winners of the GMAT game show

     January 22, 2019

     January 22, 2019

     10:00 PM PST

     11:00 PM PST

    In case you didn’t notice, we recently held the 1st ever GMAT game show and it was awesome! See who won a full GMAT course, and register to the next one.

In a group of 70, every member speaks English or French. How many

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

Hide Tags

 
Manager
Manager
User avatar
G
Joined: 07 Jun 2017
Posts: 174
Location: India
Concentration: Technology, General Management
GMAT 1: 660 Q46 V38
GPA: 3.6
WE: Information Technology (Computer Software)
GMAT ToolKit User Reviews Badge
In a group of 70, every member speaks English or French. How many  [#permalink]

Show Tags

New post 26 Oct 2017, 21:35
1
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

41% (01:11) correct 59% (01:14) wrong based on 92 sessions

HideShow timer Statistics

In a group of 70, every member speaks English or French. How many members speak only French?

(1) 50 members speak English.
(2) 10 members speak both English and French.

_________________

Regards,
Naveen
email: nkmungila@gmail.com
Please press kudos if you like this post

Manager
Manager
User avatar
S
Joined: 05 Dec 2016
Posts: 243
Concentration: Strategy, Finance
GMAT 1: 620 Q46 V29
GMAT ToolKit User
Re: In a group of 70, every member speaks English or French. How many  [#permalink]

Show Tags

New post 26 Oct 2017, 22:44
Total=English+French+Both
70=English+French+Both
(1) 50 persons speak english, including both, so we have got the value for 2 out of 3 variables from the equation above, substituting:
70=50(English+Both)+French
French=70-50=20
Sufficient
(2) 10 person both speak english and french, that gives us value for 1 out of 3 variables from tha equation above, hence Insufficient.

Answer A
Intern
Intern
User avatar
S
Joined: 15 Mar 2017
Posts: 41
Location: India
Concentration: International Business, Strategy
GMAT 1: 720 Q50 V37
GPA: 4
Re: In a group of 70, every member speaks English or French. How many  [#permalink]

Show Tags

New post 19 Dec 2017, 02:16
Alexey1989x wrote:
Total=English+French+Both
70=English+French+Both
(1) 50 persons speak english, including both, so we have got the value for 2 out of 3 variables from the equation above, substituting:
70=50(English+Both)+French
French=70-50=20
Sufficient
(2) 10 person both speak english and french, that gives us value for 1 out of 3 variables from tha equation above, hence Insufficient.

Answer A



Hi Alexey1989x,

Total number of people would be = English + French - both ( using the set formula for 2 elements )

Statement 1 gives the value of English + both = 50
Number of variables = 3; Equations = 2 Cannot be solved

Similarly for statement 2
Number of variables = 3; Equations = 2 Cannot be solved

Using both the statements we have 3 equations and 3 statements. Can be solved easily.

French = 40, English = 40 and both = 10
_________________

You give kudos, you get kudos. :D

Manager
Manager
User avatar
S
Joined: 05 Dec 2016
Posts: 243
Concentration: Strategy, Finance
GMAT 1: 620 Q46 V29
GMAT ToolKit User
Re: In a group of 70, every member speaks English or French. How many  [#permalink]

Show Tags

New post 19 Dec 2017, 02:23
SaGa wrote:
Alexey1989x wrote:
Total=English+French+Both
70=English+French+Both
(1) 50 persons speak english, including both, so we have got the value for 2 out of 3 variables from the equation above, substituting:
70=50(English+Both)+French
French=70-50=20
Sufficient
(2) 10 person both speak english and french, that gives us value for 1 out of 3 variables from tha equation above, hence Insufficient.

Answer A



Hi Alexey1989x,

Total number of people would be = English + French - both ( using the set formula for 2 elements )

Statement 1 gives the value of English + both = 50
Number of variables = 3; Equations = 2 Cannot be solved

Similarly for statement 2
Number of variables = 3; Equations = 2 Cannot be solved

Using both the statements we have 3 equations and 3 statements. Can be solved easily.

French = 40, English = 40 and both = 10


"Statement 1 gives the value of English + both = 50
Number of variables = 3; Equations = 2 Cannot be solved "

Total=English + both + French
70=50+French
French=20 (iaw to the stimulkus we need ONLY French)

A is sufficient
Retired Moderator
avatar
D
Joined: 25 Feb 2013
Posts: 1220
Location: India
GPA: 3.82
GMAT ToolKit User Premium Member Reviews Badge
Re: In a group of 70, every member speaks English or French. How many  [#permalink]

Show Tags

New post 19 Dec 2017, 11:04
SaGa wrote:
Alexey1989x wrote:
Total=English+French+Both
70=English+French+Both
(1) 50 persons speak english, including both, so we have got the value for 2 out of 3 variables from the equation above, substituting:
70=50(English+Both)+French
French=70-50=20
Sufficient
(2) 10 person both speak english and french, that gives us value for 1 out of 3 variables from tha equation above, hence Insufficient.

Answer A



Hi Alexey1989x,

Total number of people would be = English + French - both ( using the set formula for 2 elements )

Statement 1 gives the value of English + both = 50
Number of variables = 3; Equations = 2 Cannot be solved

Similarly for statement 2
Number of variables = 3; Equations = 2 Cannot be solved

Using both the statements we have 3 equations and 3 statements. Can be solved easily.

French = 40, English = 40 and both = 10


Hi SaGa

Total = Only English+Only French+Both. As (Both+Only English)=English

so Total = English+Only French

70=50+Only French => French=70-50=20. Sufficient
Intern
Intern
User avatar
S
Joined: 15 Mar 2017
Posts: 41
Location: India
Concentration: International Business, Strategy
GMAT 1: 720 Q50 V37
GPA: 4
Re: In a group of 70, every member speaks English or French. How many  [#permalink]

Show Tags

New post 20 Dec 2017, 05:09
Thank you Alexey1989x and niks18. I got confused with only English and English ( only English + both )
_________________

You give kudos, you get kudos. :D

GMAT Club Bot
Re: In a group of 70, every member speaks English or French. How many &nbs [#permalink] 20 Dec 2017, 05:09
Display posts from previous: Sort by

In a group of 70, every member speaks English or French. How many

  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®.