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.
It appears that you are browsing the GMAT Club forum unregistered!
Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club
Registration gives you:
Tests
Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.
Applicant Stats
View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more
Books/Downloads
Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Re: Unitary method problem:easy problem but confusing answer [#permalink]
23 Jun 2009, 00:23
IMO the answer is C but writing of problem made it confusing. This question is will be a good sentence correction question rather than a problem solving question.
Re: Unitary method problem:easy problem but confusing answer [#permalink]
24 Jun 2009, 05:56
mdfrahim wrote:
No. of boys = \(40 * \frac{9}{20}\) =18. No. of right handed boys = 4/5 of 18 or (d) Between 14 and 18.
I did the same but reading carefully the question it looks misleading: it is not clear if the 4/5 represents the right-handed part of the boys or of the whole bunch of students.
Re: Unitary method problem:easy problem but confusing answer [#permalink]
15 Apr 2012, 03:07
The question again is very badly worded. What they want you to work out is:
that 9/20 of the class are boys = 40 x 9/20 = 18
and then
4/5 of the class are right handed = 40 x 4/5 = 32
All 18 boys could be right handed or a minimum of 10 could be right handed as 8 people in the class are left handed. If all the left handed pupils are boys then 18 - 8 = 10 right handers.
Answer is C between 18 and 10 The way they right it leads you to believe that 4/5 of the boys are right handed but you can't have 14.4 boys. The starting question needs to be alterred so it states 4/5 of the class are right handed.
Re: There are 40 students in a classroom, 9/20 of them are boys [#permalink]
15 Apr 2012, 05:27
2
This post received KUDOS
Expert's post
apurva1985 wrote:
There are 40 students in a classroom, 9/20 of them are boys and 4/5 of them are right-handed. How many right-handed boys are there in the classroom?
A. Between 10 and 32. B. Between 14 and 32. C. Between 10 and 18. D. Between 14 and 18. E. Between 18 and 36.
this is a very easy problem but i am confused............ between two answers C and D
I agree that the wording of the question could have been better. For example the question should ask what is the minimum and the maximum # of right-handed boys possible, in this case the answer would be: 10 and 18.
Given that there are 18 boys (9/20*40=18) and 22 girls in the class. Also we know that out of 40 students 32 are right-handed (4/5*40=32).
Maximum number of right-handed boys possible is if ALL 18 boys are right-handed; Minimum number of right-handed boys possible is if ALL 22 girls are right-handed, so in this case 32-22=10 boys would be right-handed.
Re: There are 40 students in a classroom, 9/20 of them are boys [#permalink]
18 Aug 2013, 09:03
Solution Attached :
Attachments
genera.jpeg [ 19.36 KiB | Viewed 1901 times ]
_________________
Rgds, TGC! _____________________________________________________________________ I Assisted You => KUDOS Please _____________________________________________________________________________
gmatclubot
Re: There are 40 students in a classroom, 9/20 of them are boys
[#permalink]
18 Aug 2013, 09:03
As I’m halfway through my second year now, graduation is now rapidly approaching. I’ve neglected this blog in the last year, mainly because I felt I didn’...
Perhaps known best for its men’s basketball team – winners of five national championships, including last year’s – Duke University is also home to an elite full-time MBA...
Hilary Term has only started and we can feel the heat already. The two weeks have been packed with activities and submissions, giving a peek into what will follow...