Author 
Message 
TAGS:

Hide Tags

Manager
Joined: 16 Feb 2012
Posts: 213
Concentration: Finance, Economics

If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
09 Jul 2012, 02:43
2
This post received KUDOS
9
This post was BOOKMARKED
Question Stats:
52% (01:25) correct 48% (01:22) wrong based on 187 sessions
HideShow timer Statistics
If 2/5 of the students at College C are business majors, what is the number of female students at College C? (1) 2/5 of the male students at College C are business majors. (2) 200 of the female students at College C are business majors.
Official Answer and Stats are available only to registered users. Register/ Login.
_________________
Kudos if you like the post!
Failing to plan is planning to fail.



Math Expert
Joined: 02 Sep 2009
Posts: 43867

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
09 Jul 2012, 03:02
2
This post received KUDOS
Expert's post
2
This post was BOOKMARKED



Manager
Status: Juggg..Jugggg Go!
Joined: 11 May 2012
Posts: 237
Location: India
GC Meter: A.W.E.S.O.M.E
Concentration: Entrepreneurship, General Management
GMAT 1: 620 Q46 V30 GMAT 2: 720 Q50 V38

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
09 Jul 2012, 03:09
C it is. Given: 2/5 students Business majors 1. 2/5 BM = Male . =>3/5 of BM Female. Insuff 2. BM Female = 300 c combine the two 300=(2/5)(3/5) Students
_________________
You haven't failed, if you haven't given up!  bschooladmit Visit my Blog www.bschooladmit.wordpress.com
Check out my other posts: Bschool Deadlines 20132014  Bschool Admission Events 2013 Start your GMAT Prep with Stacey Koprince  Get a head start in MBA finance



Manager
Joined: 05 Mar 2012
Posts: 62

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
10 Jul 2012, 07:07
Bunuel wrote: If 2/5 of the students at College C are business majors, what is the number of female students at College C?
Given: 2/5(Female+Male)=Business Majors. Question: Female=?
(1) 2/5 of the male students at College C are business majors > 2/5*M=Male Business Majors. Not sufficient.
(2) 200 of the female students at College C are business majors > Female Business Majors=200. Not sufficient.
(1)+(2) {Business Majors}={Male Business Majors}+{Female Business Majors} > 2/5(F+M)=2/5*M+200 > 2/5*F=200 > F=500. Sufficient.
Answer: C. Based on what you put for (2), (2/5)(Females) = 200, therefore Females = (5/2)(200) = 500. Why bother tangling it with the males? We already know from the question that (2/5)(Males + Females) = business majors and statement 1 is just a repeat of what is given.



Math Expert
Joined: 02 Sep 2009
Posts: 43867

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
10 Jul 2012, 07:20
Injuin wrote: Bunuel wrote: If 2/5 of the students at College C are business majors, what is the number of female students at College C?
Given: 2/5(Female+Male)=Business Majors. Question: Female=?
(1) 2/5 of the male students at College C are business majors > 2/5*M=Male Business Majors. Not sufficient.
(2) 200 of the female students at College C are business majors > Female Business Majors=200. Not sufficient.
(1)+(2) {Business Majors}={Male Business Majors}+{Female Business Majors} > 2/5(F+M)=2/5*M+200 > 2/5*F=200 > F=500. Sufficient.
Answer: C. Based on what you put for (2), (2/5)(Females) = 200, therefore Females = (5/2)(200) = 500. Why bother tangling it with the males? We already know from the question that (2/5)(Males + Females) = business majors and statement 1 is just a repeat of what is given. There was a typo. From (2): 200 of the female students at College C are business majors > Female Business Majors=200. Not (2/5)(Females) = 200.
_________________
New to the Math Forum? Please read this: Ultimate GMAT Quantitative Megathread  All You Need for Quant  PLEASE READ AND FOLLOW: 12 Rules for Posting!!! Resources: GMAT Math Book  Triangles  Polygons  Coordinate Geometry  Factorials  Circles  Number Theory  Remainders; 8. Overlapping Sets  PDF of Math Book; 10. Remainders  GMAT Prep Software Analysis  SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS)  Tricky questions from previous years.
Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
What are GMAT Club Tests? Extrahard Quant Tests with Brilliant Analytics



Manager
Joined: 05 Mar 2012
Posts: 62

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
10 Jul 2012, 07:28
I hope you will be patient with me since it's been a long morning, but here is my reasoning, even after sifting through the various related threads:
We are given that 2/5 of the students are business majors so (2/5)(Males+Females) = Business majors. Expanded, we have Business majors = (2/5)(Males)+(2/5)(Females) = Business majors. Therefore 2/5 males are business majors and 2/5 females are business majors.
Statement 1 just repeats that (2/5)(Males) are business majors
Statement 2 says that 200 females are business majors. We can equate that (2/5)(Females) = 200 from the expanded information provided and have the final form be Females = (5/2)(200) = 500.
For the life of me I cannot see how statement 2 is insufficient unless I am confused about how the information they gave us is constructed as stated.



Math Expert
Joined: 02 Sep 2009
Posts: 43867

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
10 Jul 2012, 07:40
Injuin wrote: I hope you will be patient with me since it's been a long morning, but here is my reasoning, even after sifting through the various related threads:
We are given that 2/5 of the students are business majors so (2/5)(Males+Females) = Business majors. Expanded, we have Business majors = (2/5)(Males)+(2/5)(Females) = Business majors. Therefore 2/5 males are business majors and 2/5 females are business majors.
Statement 1 just repeats that (2/5)(Males) are business majors
Statement 2 says that 200 females are business majors. We can equate that (2/5)(Females) = 200 from the expanded information provided and have the final form be Females = (5/2)(200) = 500.
For the life of me I cannot see how statement 2 is insufficient unless I am confused about how the information they gave us is constructed as stated. The red part is not correct. 2/5 (40%) of the students are business majors does not mean that 40% of males and 40% of females are business majors. For example: say there are 300 males and 200 females (total of 500 students), then there will be 2/5*500=200 business majors. So, it could be that 100% of females and 0% of males are business majors. Hope it's clear.
_________________
New to the Math Forum? Please read this: Ultimate GMAT Quantitative Megathread  All You Need for Quant  PLEASE READ AND FOLLOW: 12 Rules for Posting!!! Resources: GMAT Math Book  Triangles  Polygons  Coordinate Geometry  Factorials  Circles  Number Theory  Remainders; 8. Overlapping Sets  PDF of Math Book; 10. Remainders  GMAT Prep Software Analysis  SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS)  Tricky questions from previous years.
Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
What are GMAT Club Tests? Extrahard Quant Tests with Brilliant Analytics



Manager
Joined: 05 Mar 2012
Posts: 62

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
10 Jul 2012, 07:55
I can see how that situation will make what I said incorrect, but then I do not know how I would setup a question like this in the future. I was under the impression that students = males + females. Therefore if 2/5 students are business majors, then 2/5 (males + females) are business majors. What rule did I violate to cause me to tunnel vision into thinking that the aforementioned equation could be expanded into (2/5)(males) + (2/5)(females)?



Math Expert
Joined: 02 Sep 2009
Posts: 43867

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
10 Jul 2012, 07:58



Manager
Joined: 05 Mar 2012
Posts: 62

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
10 Jul 2012, 08:01
Ah, I ended up thinking of variables as words. Thank you for the clarification.



Manager
Status: exam is close ... dont know if i ll hit that number
Joined: 06 Jun 2011
Posts: 187
Location: India
Concentration: International Business, Marketing
GMAT Date: 10092012
GPA: 3.2

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
14 Jul 2012, 02:10
Stiv wrote: If 2/5 of the students at College C are business majors, what is the number of female students at College C?
(1) 2/5 of the male students at College C are business majors. (2) 200 of the female students at College C are business majors. could this question be categorised into word problem,,, i made a mistake and think the words used were tricky,, did the same happen to u??
_________________
just one more month for exam...



NonHuman User
Joined: 09 Sep 2013
Posts: 13801

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
01 Jul 2015, 11:11
Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up  doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Books  GMAT Club Tests  Best Prices on GMAT Courses  GMAT Mobile App  Math Resources  Verbal Resources



NonHuman User
Joined: 09 Sep 2013
Posts: 13801

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
12 Sep 2016, 00:34
Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up  doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Books  GMAT Club Tests  Best Prices on GMAT Courses  GMAT Mobile App  Math Resources  Verbal Resources



Director
Joined: 26 Oct 2016
Posts: 682
Location: United States
Concentration: Marketing, International Business
GPA: 4
WE: Education (Education)

Re: If 2/5 of the students at College C are business majors, wha [#permalink]
Show Tags
11 Feb 2017, 22:21
Assume male students =X Female students = y total Biz majors = (2/5)(X+y) nonBiz majors =(1 2/5)(X+Y) = (3/5)(x+y) statement 1: 2/5 of males students are business majors ..which means 3/5 of male students are nonbusiness majors = 3X/5 nonbiz females=(3/5)(X+Y)3X/5=(3/5)Y no information on actual number of students not sufficient statement 2: 200 female students are business majors. no information on nonbiz majors female students not sufficient statement 1&2: 3/5 of male students are nonbiz majors and 200 female students are biz majors nonbiz females= (3/5)Y biz females = Y(3/5)Y=(2/5)Y (2/5)Y=200 =>Y=500 thus females are 500 sufficient Hence C
_________________
Thanks & Regards, Anaira Mitch




Re: If 2/5 of the students at College C are business majors, wha
[#permalink]
11 Feb 2017, 22:21






