December 14, 2018 December 14, 2018 10:00 PM PST 11:00 PM PST Carolyn and Brett  nicely explained what is the typical day of a UCLA student. I am posting below recording of the webinar for those who could't attend this session. December 15, 2018 December 15, 2018 07:00 AM PST 09:00 AM PST Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.
Author 
Message 
TAGS:

Hide Tags

SVP
Joined: 24 Aug 2006
Posts: 2090

The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
Updated on: 12 Aug 2014, 00:19
Question Stats:
60% (02:30) correct 40% (02:06) wrong based on 519 sessions
HideShow timer Statistics
The ratio by weight, measured in pounds, of books to clothes to electronics in Jorge's suitcase initially stands at 8 to 5 to 3. Jorge then removes 4 pounds of clothing from his suitcase, thereby doubling the ratio of books to clothes. Approximately how much do the electronics in the suitcase weigh, to the nearest pound? A. 3 B. 4 C. 5 D. 6 E. 7
Official Answer and Stats are available only to registered users. Register/ Login.
Originally posted by kidderek on 08 Nov 2006, 19:37.
Last edited by Bunuel on 12 Aug 2014, 00:19, edited 1 time in total.
Renamed the topic, edited the question, added the OA and moved to PS forum.




Manager
Joined: 03 Jan 2015
Posts: 79

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
07 Apr 2016, 03:20
Given =
\(B : C : E\) \(8 : 5 : 3\)
\(\frac{8x}{5x4}\) = \(\frac{16}{5}\) > \(8x(5) = 16(5x  4)\) > \(40x = 80x  64\) > \(40x = 64\) > \(x = 1.6\)
\(1.6 * 3 = 4.8\)
Answer C




Manager
Joined: 01 Oct 2006
Posts: 235

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
08 Nov 2006, 22:00
I also go for C. Electronics weigh 4.8 pounds, approx 5



Director
Joined: 05 Feb 2006
Posts: 864

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
09 Nov 2006, 00:48
I am also getting C... however look at my calculations, why i am getting this?
b+c+e=16
b/c=8/5..... (1)
b/c4=16/5.....(2)
From (1)
5b=8c
b=8/5c....include this in (2)
From (2)
5b=16c64....include b from (1)
8c=16c64
8c=64
c=8
If c=8, then b is
b/8=8/5
5b=64
b=12,8
12.8+8+e=16
20.8+e=16
e=4.8..... why i'am getting this?



GMAT Club Legend
Joined: 07 Jul 2004
Posts: 4821
Location: Singapore

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
09 Nov 2006, 01:38
Ratio
B:C:E = 8:5:3
Total weight of items = x
Weight of books = 8x/16
Weight of clothes = 5x/16
Wegith of electronics = 3x/16
New total weight of items = (x4)
Weight of clothes = 5x/16  4 = (5x64)/16
New Ratio B:C:E =
8x/16(x4) : (5x64)/16(x4) : 3x/16(x4)
8x : 5x64 : 3x
We're told B:C = 16:5
So B/C = 16/5 = 8x/5x64
80x  1024 = 40x
40x = 1025
x = 25.6
Electronics = 3x/16 = 4.8 pounds ~ 5 pounds



SVP
Joined: 24 Aug 2006
Posts: 2090

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
09 Nov 2006, 06:32
ywilfred wrote: Ratio B:C:E = 8:5:3
Total weight of items = x
Weight of books = 8x/16 Weight of clothes = 5x/16 Wegith of electronics = 3x/16
New total weight of items = (x4) Weight of clothes = 5x/16  4 = (5x64)/16
New Ratio B:C:E = 8x/16(x4) : (5x64)/16(x4) : 3x/16(x4) 8x : 5x64 : 3x
We're told B:C = 16:5 So B/C = 16/5 = 8x/5x64 80x  1024 = 40x 40x = 1025 x = 25.6
Electronics = 3x/16 = 4.8 pounds ~ 5 pounds
Maybe I'm misunderstanding the question, but if the weights of the B:C:E is 12.8 : 8 : 4.8, and you take four pounds of clothes away, aren't you left with 12.8 : 4 : 4.8? But 12.8 is more than double 4.



Manager
Joined: 03 Nov 2006
Posts: 161

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
09 Nov 2006, 06:47
By removing the 4 pounds, you're doubling the original ratio  not making B double C. So the new ratio is 16/5



SVP
Joined: 24 Aug 2006
Posts: 2090

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
09 Nov 2006, 07:28
hosam wrote: By removing the 4 pounds, you're doubling the original ratio  not making B double C. So the new ratio is 16/5
thank you.
i gotta be more careful in reading these problems.



Senior Manager
Joined: 10 Dec 2008
Posts: 445
Location: United States
GPA: 3.9

Ambiguous interpretation... possible in real GMAT?
[#permalink]
Show Tags
20 Jul 2009, 13:19
I was wondering if anyone else experienced confusion during the question. Take this example from MGMAT: The ratio by weight, measured in pounds, of books to clothes to electronics in Jorge's suitcase initially stands at 8 to 5 to 3. Jorge then removes 4 pounds of clothing from his suitcase, thereby doubling the ratio of books to clothes. Approximately how much do the electronics in the suitcase weigh, to the nearest pound? a) 3 b) 4 c) 5 d) 6 e) 7 When I hear, thereby "doubling" the ratio of books to clothes, I think that the book to clothes ratio become 2:1, which is colloquial but not correct. Their answer: Initially the ratio of B: C: E can be written as 8x: 5x: 3x. (Recall that ratios always employ a common multiplier to calculate the actual numbers.) After removing 4 pounds of clothing, the ratio of books to clothes is doubled. To double a ratio, we double just the first number; in this case, doubling 8 to 5 yields a new ratio of 16 to 5. This can be expressed as follows: 8x/5x – 4 = 16/5. Cross multiply to solve for x: 40x = 80x – 64 40x = 64 x = 8/5 The question asks for the approximate weight of the electronics in the suitcase. Since there are 3x pounds of electronics there are 3 × (8/5) = 24/5 or approximately 5 pounds of electronics in the suitcase. The correct answer is C. However, I did 8x/5x – 4 = 2. => choice d) I see how they mean "double" due to the technicalities of the english sentence but I would be really ticked off if this appeared on an actual GMAT. Is this MGMAT's lack of clarity or will the real GMAT use this tricky language?



GMAT Tutor
Joined: 24 Jun 2008
Posts: 1325

Re: Ambiguous interpretation... possible in real GMAT?
[#permalink]
Show Tags
20 Jul 2009, 16:15
bipolarbear wrote: The ratio by weight, measured in pounds, of books to clothes to electronics in Jorge's suitcase initially stands at 8 to 5 to 3. Jorge then removes 4 pounds of clothing from his suitcase, thereby doubling the ratio of books to clothes. Approximately how much do the electronics in the suitcase weigh, to the nearest pound?
There are quite a few details of the wording here which make it unlike a real GMAT question. The ratio in the question is unitless (it's the same ratio whether you measure the weights in nanograms, pounds or tons), so the phrase 'measured in pounds' is redundant and misleading. The phrase 'stands at' is a colloquialism, and not something that would appear in a real test question. When the question says Jorge's action doubles 'the ratio of books to clothes', that phrase is also misleading. The intended meaning is that it doubles 'the ratio of the weight of the books to the weight of the clothes'. One could easily think the statement was referring to the number of books, for example, and not their weight. No real GMAT question is ever so imprecise with its wording. However, I don't have an issue with the phrase 'doubling the ratio'; ratios are fractions, so if you double a ratio, you're multiplying the first part of the ratio  the numerator  by 2.
_________________
GMAT Tutor in Toronto
If you are looking for online GMAT math tutoring, or if you are interested in buying my advanced Quant books and problem sets, please contact me at ianstewartgmat at gmail.com



Manager
Joined: 03 Jul 2009
Posts: 101
Location: Brazil

Re: Ambiguous interpretation... possible in real GMAT?
[#permalink]
Show Tags
21 Jul 2009, 16:09
bipolarbear, If you have a question like that on Real GMAT, ask for IanStewart write for GMAC to cancel the question.....hehe
This explanation gave me hope. When I read the question I had the same impression: What exactly the question mean?



Manager
Joined: 27 Jun 2008
Posts: 136

Re: Ambiguous interpretation... possible in real GMAT?
[#permalink]
Show Tags
21 Jul 2009, 19:49
Think that doubling ratio has a fairly straight forward meaning i.e. X:Y to double would result in 2X:Y



Intern
Joined: 24 Sep 2016
Posts: 4

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
08 May 2017, 06:14
B:C:E=8:5:3
B=8x & C=5x C'=C4=5x4
B:C'=8x/(5x4)=2*8/5
40x=80x64 =>36x=64 =>x=16/9
E=3 * 16/9 =5.33 ~~ 5 (C)



Manager
Joined: 14 May 2015
Posts: 51

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
08 May 2017, 10:13
8x/(5x4)=16/5 x=64/40 electronics=64/40*3=5(ans)



Manager
Joined: 19 Aug 2015
Posts: 91
Location: India

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
09 May 2017, 07:40
Ration of weights B:C:E = 8:5:3 Then weight of Book, Clothes and Electronics be 8a,5a,3a respectively. After removing 4pounds from clothes B:C become 2*8:5 This gives, 8a/(5a4) = 2*8/5 a = 1.6 So weight of electronics = 3*1.6 = 4.8 ~ 5 Answer C



Intern
Joined: 28 Jun 2017
Posts: 1

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
07 Jul 2017, 09:40
ywilfred wrote: Ratio B:C:E = 8:5:3
Total weight of items = x
Weight of books = 8x/16 Weight of clothes = 5x/16 Wegith of electronics = 3x/16
New total weight of items = (x4) Weight of clothes = 5x/16  4 = (5x64)/16
New Ratio B:C:E = 8x/16(x4) : (5x64)/16(x4) : 3x/16(x4) 8x : 5x64 : 3x
We're told B:C = 16:5 So B/C = 16/5 = 8x/5x64 80x  1024 = 40x 40x = 1025 x = 25.6
Electronics = 3x/16 = 4.8 pounds ~ 5 pounds Could just be that it is a very long day, but can someone please explain how upon doubling 8x/5x4, it becomes 16/5? I can't get past this step.



Manager
Joined: 27 Jan 2016
Posts: 139

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
20 Jul 2017, 00:36
kidderek wrote: The ratio by weight, measured in pounds, of books to clothes to electronics in Jorge's suitcase initially stands at 8 to 5 to 3. Jorge then removes 4 pounds of clothing from his suitcase, thereby doubling the ratio of books to clothes. Approximately how much do the electronics in the suitcase weigh, to the nearest pound?
A. 3 B. 4 C. 5 D. 6 E. 7 B/C = 8/5 So 5B=8C Eqn1 B/C4 = 16/5 So 5B=16C64Eqn2 Solving Eqn 1 & 2 8C=16C64 So C=8 C/E=5/3 8/E=5/3 E=24/5 = 5



Target Test Prep Representative
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2830

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
25 Jul 2017, 10:49
kidderek wrote: The ratio by weight, measured in pounds, of books to clothes to electronics in Jorge's suitcase initially stands at 8 to 5 to 3. Jorge then removes 4 pounds of clothing from his suitcase, thereby doubling the ratio of books to clothes. Approximately how much do the electronics in the suitcase weigh, to the nearest pound?
A. 3 B. 4 C. 5 D. 6 E. 7 We are given that the ratio of books to clothes to electronics = 8x : 5x : 3x. We are also given that Jorge removes 4 pounds of clothing from his suitcase, thereby doubling the ratio of books to clothes, from 8/5 to (2)(8)/5. Thus: 2(8)/5 = 8x/(5x  4) 16(5x  4) = 40x 80x  64 = 40x 40x = 64 x = 64/40 = 1.6 Thus, we see the electronics weigh 3 x 1.6 = 4.8 or about 5 pounds. Answer: C
_________________
Jeffery Miller
Head of GMAT Instruction
GMAT Quant SelfStudy Course
500+ lessons 3000+ practice problems 800+ HD solutions



NonHuman User
Joined: 09 Sep 2013
Posts: 9162

Re: The ratio by weight, measured in pounds, of books to clothes
[#permalink]
Show Tags
06 Oct 2018, 10:39
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




Re: The ratio by weight, measured in pounds, of books to clothes &nbs
[#permalink]
06 Oct 2018, 10:39






