BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

What fraction of all the boxes..?? :s

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 88
Joined: Sat Oct 15, 2011 6:38 pm
Thanked: 1 times
Followed by:1 members

What fraction of all the boxes..?? :s

by gmatpup » Sat Nov 12, 2011 7:45 am
At a loading dock, each worker on the night crew loaded 3/4 as many boxes as each worker on the day crew. If the night crew has 4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?

A. 1/2

B. 2/5

C. 3/5

D. 4/5

E. 5/8

Answer is E

Can someone please give me a simple solution? I keep picking C, and obviously I am wrong :(

Thanks so so much!!
Top
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 588
Joined: Sun Oct 16, 2011 9:42 am
Location: New Delhi, India
Thanked: 130 times
Followed by:9 members
GMAT Score:720

by rijul007 » Sat Nov 12, 2011 8:01 am
am too getting C again and again

can you check your source again...
Top
Senior | Next Rank: 100 Posts
Posts: 88
Joined: Sat Oct 15, 2011 6:38 pm
Thanked: 1 times
Followed by:1 members

by gmatpup » Sat Nov 12, 2011 8:07 am
This question is from the OG 12th edition so it is definitely correct.. I just don't see how to get answer E
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pm
Location: Milpitas, CA
Thanked: 1854 times
Followed by:523 members
GMAT Score:770

by Anurag@Gurome » Sat Nov 12, 2011 8:08 am
Here is a solution posted by Rahul : https://www.beatthegmat.com/ps-138-t68828.html#310799
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/
Top
User avatar
Legendary Member
Posts: 588
Joined: Sun Oct 16, 2011 9:42 am
Location: New Delhi, India
Thanked: 130 times
Followed by:9 members
GMAT Score:720

by rijul007 » Sat Nov 12, 2011 8:19 am
gmatpup wrote:This question is from the OG 12th edition so it is definitely correct.. I just don't see how to get answer E

I got it where we went wrong

At a loading dock, each worker on the night crew loaded 3/4 as many boxes as each worker on the day crew. If the night crew has 4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?
Top
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pm
Location: New York, NY
Thanked: 13060 times
Followed by:1906 members
GMAT Score:790

by GMATGuruNY » Sat Nov 12, 2011 12:19 pm
gmatpup wrote:At a loading dock, each worker on the night crew loaded 3/4 as many boxes as each worker on the day crew. If the night crew has 4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?

A. 1/2

B. 2/5

C. 3/5

D. 4/5

E. 5/8

Answer is E

Can someone please give me a simple solution? I keep picking C, and obviously I am wrong :(

Thanks so so much!!
I posted a solution here:

https://www.beatthegmat.com/algebra-appl ... tml#353208
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
User avatar
Newbie | Next Rank: 10 Posts
Posts: 9
Joined: Thu Sep 15, 2011 9:41 am

by JohnRapp » Sat Nov 12, 2011 1:46 pm
gmatpup wrote:At a loading dock, each worker on the night crew loaded 3/4 as many boxes as each worker on the day crew. If the night crew has 4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?

A. 1/2

B. 2/5

C. 3/5

D. 4/5

E. 5/8

Answer is E

Can someone please give me a simple solution? I keep picking C, and obviously I am wrong :(

Thanks so so much!!
Since both of the ratios are in the form night crew to day crew I just assumed the day crew consists of 5 workers, each of which loads only one box per shift. With those assumptions:

Day crew= 5 * 1 = 5 boxes.
Night crew= 4 * 3/4 = 3 boxes.

Total boxes for both shifts = 8.
Total boxes by day crew = 5.

Answer = [spoiler]5/8 (E)[/spoiler]
Top
User avatar
Legendary Member
Posts: 516
Joined: Fri Jul 31, 2009 3:22 pm
Thanked: 112 times
Followed by:13 members

by smackmartine » Sat Nov 12, 2011 3:19 pm
IMO E
Bn=Boxes loaded at night
Bd=Boxes loaded during the day

Wn=# of workers at night
Wd=# of workers during the day

To answer : Bd/(Bd+Bn) ?
-----------------------
Boxes loaded per worker at night =Bn/Wn
Boxes loaded per worker during day =Bd/Wd

Given that, Wn=4/5(Wd) and Bn/Wn = 3/4(Bd/Wd)

Combining both , we get Bn/Bd = 3/5
Adding 1 both sides, we get (Bn+Bd)/Bd = 8/5 ,so Bd/(Bn+Bd) = 5/8
Smack is Back ...
It takes time and effort to explain, so if my comment helped you please press Thanks button :)
Top
Master | Next Rank: 500 Posts
Posts: 382
Joined: Thu Mar 31, 2011 5:47 pm
Thanked: 15 times

by ArunangsuSahu » Sun Nov 13, 2011 8:06 am
Simple Solution Approach:

Clue: Always try to take a number that divides the denominator completely.
So Let's assume No.Of day workers = 5
and Load taken by each day worker =4

Total Load Taken by day worker =5*4=20
There for Total Load Taken by night worker = 4*3=12
So Total load by two crew=20+12=32

Reqd fraction = day load/Total Load = 20/32=5/8

Ans:(E)
Top
Post new topic Post Reply
• Page 1 of 1