A store sells milk in cartons of two sizes, one-half gallon

Oldest

Best Reply

Author

Message

TAGS:

Manager

Joined: 23 Jan 2008

Posts: 115

Followers: 1

Kudos [?]: 12 [0], given: 0

A store sells milk in cartons of two sizes, one-half gallon [#permalink]

31 Jan 2008, 19:57

00:00

Question Stats:

89% (01:43) correct

10% (00:28) wrong

based on 29 sessions

A store sells milk in cartons of two sizes, one-half gallon and one-quarter gallon. If the store sold a total of 300 cartons of mild yesterday, how many gallons of milk did it sell yesterday?

(1) Yesterday the store sold 120 one-quarter-gallon cartons of milk
(2) Yesterday the store sold 90 gallons of milk in one-half-gallon cartons

[Reveal] Spoiler: OA

Last edited by Bunuel on 05 Mar 2013, 01:57, edited 1 time in total.

Moved to DS forum and added the OA.

Manager

Joined: 06 Jan 2008

Posts: 219

Followers: 1

Kudos [?]: 15 [0], given: 1

Re: gallons [#permalink]

31 Jan 2008, 20:05

I have to say D, either are sufficient.
Given: Store sells only half and qtr gallon cartons of milk. 300 Cartons were sold. We need to know how many of one type was sold to solve for the other.

1) Since 300 were sold, 120 were qtr gal, the other 180 were half gal
2) tells us that 180 half gal cartons were sold (90 Gallons of milk from half gallon cartons), the other 120 must have been qtr gallons.

Unless the question is pulling some kind of BS like the cartons aren't full or something, in which case, it's not a question worth working on, imho.

SVP

Joined: 28 Dec 2005

Posts: 1612

Followers: 1

Kudos [?]: 54 [0], given: 2

Re: gallons [#permalink]

31 Jan 2008, 21:15

should be d.

x*0.5 + y*0.25 and x+y=300.

stat 1 tells us y, and we can figure out x, and therefore total amount of milk

stat 2 tells us x, and we can find y and therefore total amount of milk

CEO

Joined: 29 Mar 2007

Posts: 2618

Followers: 13

Kudos [?]: 145 [0], given: 0

Re: gallons [#permalink]

31 Jan 2008, 22:11

blog wrote:

A store sells milk in cartons of two sizes , one-half gallon and one-quarter gallon. If the store sold a total of 300 cartons of milk yesterday, how many gallons of milk did it sell yesterday?

1. yesterday the store sold 120 one-quarter-gallons of milk.
2. Yesterday the store sold 90 gallons of milk in one-half-gallon cartons.

300=x+y

1: we know y so we can figure out x. Thus we can figure out the amount of gallons

2: .5x=90 --> x=180 cartons We can find y b/c we know x

D

Senior Manager

Joined: 29 Nov 2012

Posts: 392

Followers: 1

Kudos [?]: 18 [0], given: 312

Re: A store sells milk in cartons of two sizes , one-half gallon [#permalink]

02 Mar 2013, 03:11

I'm getting different answers when I solve to prove its D can someone please provide detailed explanation with equations! thanks

Veritas Prep GMAT Instructor

Joined: 16 Oct 2010

Posts: 3170

Location: Pune, India

Followers: 597

Kudos [?]: 2127 [0], given: 97

Re: A store sells milk in cartons of two sizes , one-half gallon [#permalink]

04 Mar 2013, 21:21

fozzzy wrote:

I'm getting different answers when I solve to prove its D can someone please provide detailed explanation with equations! thanks

blog wrote:

Nq - Number of quarter gallon cartons sold
(300 - Nq) - Number of half gallon cartons sold

Gallons of milk sold = Nq*(1/4) + (300 - Nq)*(1/2)

1. yesterday the store sold 120 one-quarter-gallons of milk.
I assuming that they meant '120 one-quarter-gallon cartons of milk'.

So Nq = 120. So, Nh = 180
Gallons of milk sold = 120*(1/4) = 180*(1/2)

2. Yesterday the store sold 90 gallons of milk in one-half-gallon cartons.

(300 - Nq)*(1/2) = 90
300 - Nq = 180
Nq = 120

Gallons of milk sold = 120*(1/4) = 180*(1/2)
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Save 10% on Veritas Prep GMAT Courses And Admissions Consulting
Enroll now. Pay later. Take advantage of Veritas Prep's flexible payment plan options.

Veritas Prep Reviews

Re: A store sells milk in cartons of two sizes , one-half gallon [#permalink] 04 Mar 2013, 21:21

	Similar topics	Author	Replies	Last post
Similar Topics:	An appliance store sells two sizes of air conditioners, an	qhoc0010	8	23 Feb 2005, 11:07
	An appliance store ells two sizes of air conditioners, an	mophead	1	30 Oct 2005, 22:53
	In a certain store, they sell regular sized detergent and	gamjatang	3	24 Nov 2005, 20:31
	If Antonio bought two half-gallon cartons of ice cream	aurobindo	1	23 Jan 2007, 07:50
	A certain office supply store stocks two sizes	supridip	3	03 Dec 2008, 03:51

A store sells milk in cartons of two sizes, one-half gallon

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.