It is currently 11 Dec 2017, 21:55

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

Events & Promotions in June
Open Detailed Calendar

If there are only girl students in a class, is the number of students

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

Hide Tags

Expert Post
1 KUDOS received
Math Expert
User avatar
D
Joined: 02 Aug 2009
Posts: 5337

Kudos [?]: 6097 [1], given: 121

If there are only girl students in a class, is the number of students [#permalink]

Show Tags

New post 16 Oct 2017, 04:17
1
This post received
KUDOS
Expert's post
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

19% (00:30) correct 81% (00:54) wrong based on 46 sessions

HideShow timer Statistics

If there are only girl students in a class, is the number of students in the class less than 100?

(1) 49% of girls are above 15 years of age.
(2) 51 students are equal to or less than 15 years of age.
[Reveal] Spoiler: OA

_________________

Absolute modulus :http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html

Kudos [?]: 6097 [1], given: 121

Manager
Manager
User avatar
S
Joined: 05 Dec 2016
Posts: 248

Kudos [?]: 26 [0], given: 49

Concentration: Strategy, Finance
GMAT 1: 620 Q46 V29
GMAT ToolKit User
Re: If there are only girl students in a class, is the number of students [#permalink]

Show Tags

New post 16 Oct 2017, 04:54
We need to discover whether number of girls is more than 100.
(1) this statement give us % age breakdown, however no info about absolute values. Insufficient.
(2) No information about other age categories. Insufficient.
(1)+(2)
51% of Total number = 51 girls equal or less 15 y.o., hence total number is 100.

Answer C.

Kudos [?]: 26 [0], given: 49

Intern
Intern
avatar
B
Joined: 25 Mar 2016
Posts: 37

Kudos [?]: 5 [0], given: 2

Location: India
Concentration: Finance, General Management
WE: Other (Other)
CAT Tests
If there are only girl students in a class, is the number of students [#permalink]

Show Tags

New post 17 Oct 2017, 21:04
chetan2u wrote:
If there are only girl students in a class, is the number of students in the class less than 100?

(1) 49% of girls are above 15 years of age.
(2) 51 students are equal to or less than 15 years of age.



From the Statement 1 We can deduce that % of girls having age less than or equal to 15 is 51..
And from 2nd statement we can deduce that number of girls having age less than and equal to 15 is 51.

Let the total number of Girls be G

51/100 * G = 51

Therefor G=100

So Answer will be "C"

Kudos [?]: 5 [0], given: 2

Intern
Intern
avatar
B
Joined: 29 Mar 2016
Posts: 4

Kudos [?]: [0], given: 8

Re: If there are only girl students in a class, is the number of students [#permalink]

Show Tags

New post 17 Oct 2017, 23:21
A

S1 says (49/100)x(total) are above age 15 and it will be integer value

(49/100)x(total) will be integer for no value below 100

Kudos [?]: [0], given: 8

Expert Post
Math Expert
User avatar
D
Joined: 02 Aug 2009
Posts: 5337

Kudos [?]: 6097 [0], given: 121

Re: If there are only girl students in a class, is the number of students [#permalink]

Show Tags

New post 18 Oct 2017, 04:25
Expert's post
1
This post was
BOOKMARKED
chetan2u wrote:
If there are only girl students in a class, is the number of students in the class less than 100?

(1) 49% of girls are above 15 years of age.
(2) 51 students are equal to or less than 15 years of age.



Hi..

Remember we are dealing with INTEGERS only as students, girl, boy etc have to be complete integer


let's see the choices:-

(1) 49% of girls are above 15 years of age.
this means that the number of girls above > 15 years has to be 49 or a multiple of 49..
also \(\frac{49}{100}*g\) will be an integer..
so g has to be min 100 or a multiple of 100
answer for " is the number of students in the class less than 100" is NO
sufficient

(2) 51 students are equal to or less than 15 years of age
from this we cannot say about total..
Insufficient

A
_________________

Absolute modulus :http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html

Kudos [?]: 6097 [0], given: 121

Manager
Manager
User avatar
S
Joined: 05 Dec 2016
Posts: 248

Kudos [?]: 26 [0], given: 49

Concentration: Strategy, Finance
GMAT 1: 620 Q46 V29
GMAT ToolKit User
Re: If there are only girl students in a class, is the number of students [#permalink]

Show Tags

New post 18 Oct 2017, 04:27
Tricky one) Thanks for clarification!


Отправлено с моего iPhone используя GMAT Club Forum

Kudos [?]: 26 [0], given: 49

Re: If there are only girl students in a class, is the number of students   [#permalink] 18 Oct 2017, 04:27
Display posts from previous: Sort by

If there are only girl students in a class, is the number of students

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


GMAT Club MBA Forum Home| About| Terms and Conditions| 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®.