It is currently 23 Oct 2017, 08:31

### GMAT Club Daily Prep

#### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# A convenience store currently stocks 48 bottles of mineral

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 20 Mar 2007
Posts: 57

Kudos [?]: 16 [0], given: 0

A convenience store currently stocks 48 bottles of mineral [#permalink]

### Show Tags

13 Aug 2007, 20:04
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A convenience store currently stocks 48 bottles of mineral water. The bottles have two sizes of either 20 or 40 ounces each. The average volume per bottle the store currently has in stock is 35 ounces. How many 40 ounce bottles must be sold for the average volume per bottle to be reduced to 25 ounces if no 20 ounce bottles are sold?

A) 10
B) 20
C) 30
D) 32
E) 34

I managed to find the break up of 20 ounce and 40 ounce bottles respectively,but have gone west from there.Can someone have a look at this problem?Will post OA tomorrow.

Kudos [?]: 16 [0], given: 0

Director
Joined: 08 Jun 2007
Posts: 575

Kudos [?]: 109 [0], given: 0

Re: PS Question - averages [#permalink]

### Show Tags

13 Aug 2007, 20:41
Kiski wrote:
A convenience store currently stocks 48 bottles of mineral water. The bottles have two sizes of either 20 or 40 ounces each. The average volume per bottle the store currently has in stock is 35 ounces. How many 40 ounce bottles must be sold for the average volume per bottle to be reduced to 25 ounces if no 20 ounce bottles are sold?

A) 10
B) 20
C) 30
D) 32
E) 34

I managed to find the break up of 20 ounce and 40 ounce bottles respectively,but have gone west from there.Can someone have a look at this problem?Will post OA tomorrow.

Well this one is lengthy problem .

From the first we get
Let x be the number of 20 ounce bottle

So [20x + 40(48-x)]/48 = 35
Gives x= 12
Number of 20 ounce = 12
Number of 40ounce = 36

Let number of 40 ounce sold be y

so [ 20*12 + 40*(36 - y) ] / ( 48 -y ) = 25
which gives y = 32
So answer is D .

Kudos [?]: 109 [0], given: 0

Manager
Joined: 18 Jan 2007
Posts: 95

Kudos [?]: 9 [0], given: 0

3 x 3 [#permalink]

### Show Tags

13 Aug 2007, 21:01
You set up 3 equations and have 3 unknowns. Then solve.
Let:
x = number of 20 ounce bottles
y = number of 40 ounce bottles
h = number of bottles needing to be sold

(1) (20x + 40y) / 48 = 35
(2) (20x + 40(y-h))/ 48 - h = 25
(3) x + y = 48

Kudos [?]: 9 [0], given: 0

Manager
Joined: 18 Jan 2007
Posts: 95

Kudos [?]: 9 [0], given: 0

By the way [#permalink]

### Show Tags

13 Aug 2007, 21:09
I got h = 32. So yes I get (D) as well.

That was a long problem.

Kudos [?]: 9 [0], given: 0

By the way   [#permalink] 13 Aug 2007, 21:09
Display posts from previous: Sort by

# A convenience store currently stocks 48 bottles of mineral

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.