Problem Solving for 780+ Aspirants.

Forum Index GMAT Math Problem Solving

New MBA Student Life Forum: Ask your questions to current MBA students from Harvard, Stanford, Wharton, Kellogg and Haas

Post new topic   Reply to topic

rohan_vus
Rising GMAT Star



Joined: 03 Apr 2008
Posts: 74

Thanks given: 1
Thanked 6 times in 6 posts
Location: USA
PostThu Sep 10, 2009 6:00 am Reply with quote
IMO B .

Let out of 100 x be no of students playing Rugby or Football or both . From question stem ratio of (Either Rugby or Football or both/None playing either) = 1/3 . So Number of students out of 100 playing neither of any sport is 3x ==> we have sone simple eqn , x + 3x = 100 , gives x = 25 .

Now x = nof only Rugby + nof Football only + nof football and rugby
so number of Football = 25 - 10 = 15
Back to top
View user's profile Send private message
bharathh
Really wants to Beat The GMAT!



Joined: 27 Aug 2009
Posts: 159

Thanks given: 3
Thanked 14 times in 13 posts
PostThu Sep 10, 2009 7:09 am Reply with quote
Can you assume though that the students have to either play either sport or both sports or not play any sports at all?

Seems a bit vague to me. Unless that is the case I'd go with cannot calculate.
Back to top
View user's profile Send private message
rohan_vus
Rising GMAT Star



Joined: 03 Apr 2008
Posts: 74

Thanks given: 1
Thanked 6 times in 6 posts
Location: USA
PostThu Sep 10, 2009 7:16 am Reply with quote
Hi Bharath yes you are right ! i am assuming that there exist only 2 sports football and rubgy . I may be wrong . I feel question should have mentioned that only 2 sports exist .
Back to top
View user's profile Send private message
prindaroy
Really wants to Beat The GMAT!



Joined: 16 Jul 2009
Posts: 113

Thanks given: 0
Thanked 13 times in 10 posts

Target GMAT Score: 790
PostSun Sep 13, 2009 2:44 pm Reply with quote
yes the question is a little vague. So, essentially, for out of every 7, three play football as well? Are these the only people playing football? so if there are 70 rugby players then 30 of them play football as well and 40 play only rugby? And so, if 10% of the people play only rugby, then the people playing football should be less right?
Back to top
View user's profile Send private message
duongthang
GMAT Destroyer!



Joined: 20 May 2008
Posts: 530

Thanks given: 0
Thanked 3 times in 3 posts
PostMon Sep 21, 2009 5:33 am Reply with quote
angel ABO= angle ACO because they oposite the same arch in a circle

no need to prove. this concept is out of scope of GMAT.
Back to top
View user's profile Send private message
Talkativetree
Rising GMAT Star



Joined: 13 Oct 2009
Posts: 41

Thanks given: 1
Thanked 0 times in 0 posts
PostMon Oct 19, 2009 8:33 pm Reply with quote
I love these hard problems. Oddly enough I think they're fun. Is there anywhere else I could find similar problems?
Back to top
View user's profile Send private message
Brent Hanneson
GMAT Instructor



Joined: 08 Dec 2008
Posts: 541

Thanks given: 9
Thanked 97 times in 83 posts
Location: Halfmoon Bay, BC

GMAT Score: 770
PostSat Oct 24, 2009 9:20 am Reply with quote
Talkativetree wrote:
I love these hard problems. Oddly enough I think they're fun. Is there anywhere else I could find similar problems?
You might try Magoosh.
Of the 500 questions there, I'd say that about 100-150 of them are in the 650+ range. (some of them have already been posted in the other forums)
_________________
Brent Hanneson, BSc, BEd, MEd
Online GMAT tutor
Founder - Leap Education
www.LeapEducation.ca
Content provider for www.Magoosh.com (100's of free GMAT practice questions)

Be bold and mighty forces will come to your aid (Basil King)
Back to top
View user's profile Send private message
yregister
Just gettin' started!



Joined: 28 Oct 2009
Posts: 5

Thanks given: 4
Thanked 0 times in 0 posts
PostTue Nov 03, 2009 6:33 pm Reply with quote
www.magoosh.com is awesome !! Thanks a lot Smile

Currently google's been saying its not a safe site. Well I ignored the message and nothing much happened. Just make sure you don't give ur credit card details anywhere in it Smile
Back to top
View user's profile Send private message
Display posts from previous:   

Post new topic   Reply to topic All times are GMT - 8 Hours
Goto page Previous  1, 2, 3 ... 12, 13, 14
Page 14 of 14