It is currently 23 Sep 2020, 16:36
My Tests

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.

Of the 50 students in a school, 30 have brown hair, 21 have

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 13352
Followers: 288

Kudos [?]: 3382 [0], given: 12186

CAT Tests
Of the 50 students in a school, 30 have brown hair, 21 have [#permalink] New post 02 Jul 2018, 05:56
Expert's post
00:00

Question Stats:

100% (00:53) correct 0% (00:00) wrong based on 3 sessions
Of the 50 students in a school, 30 have brown hair, 21 have blue eyes, and 9 have both brown hair and blue eyes. How many students have neither brown hair nor blue eyes?


A. 5

B. 6

C. 7

D. 8

E. 10
[Reveal] Spoiler: OA

_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

VP
VP
Joined: 20 Apr 2016
Posts: 1302
WE: Engineering (Energy and Utilities)
Followers: 22

Kudos [?]: 1310 [0], given: 251

Re: Of the 50 students in a school, 30 have brown hair, 21 have [#permalink] New post 03 Jul 2018, 19:50
Carcass wrote:
Of the 50 students in a school, 30 have brown hair, 21 have blue eyes, and 9 have both brown hair and blue eyes. How many students have neither brown hair nor blue eyes?


A. 5

B. 6

C. 7

D. 8

E. 10


Here,
this problem can be solved using matrix approach.

Plz see the diagram attached.

Fig -1 , put all the values that are given

Fig 2 - fill up the space in the table and we get students have neither brown hair nor blue eyes = 8
Attachments

Untitled.jpg
Untitled.jpg [ 20.33 KiB | Viewed 874 times ]

Untitled1.jpg
Untitled1.jpg [ 21.45 KiB | Viewed 875 times ]


_________________

If you found this post useful, please let me know by pressing the Kudos Button


Rules for Posting

Got 20 Kudos? You can get Free GRE Prep Club Tests

GRE Prep Club Members of the Month:TOP 10 members of the month with highest kudos receive access to 3 months GRE Prep Club tests

Re: Of the 50 students in a school, 30 have brown hair, 21 have   [#permalink] 03 Jul 2018, 19:50
Display posts from previous: Sort by

Of the 50 students in a school, 30 have brown hair, 21 have

  Question banks Downloads My Bookmarks Reviews Important topics  


GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.