It is currently 19 Nov 2017, 23:28

### 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

# Mixture A is 15% alcohol, and mixture B is 50% alcohol. If

Author Message
Manager
Joined: 13 Apr 2006
Posts: 56

Kudos [?]: 14 [0], given: 0

Mixture A is 15% alcohol, and mixture B is 50% alcohol. If [#permalink]

### Show Tags

04 May 2006, 09:31
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Mixture A is 15% alcohol, and mixture B is 50% alcohol. If the two are poured together to create a 4 gallon mixture that contains 30 percent alcohol, approximately how many gallons of mixture A are in the mixture?

A. 1.5
B. 1.7
C. 2.3
D. 2.5
E. 3

Kudos [?]: 14 [0], given: 0

Director
Joined: 10 Oct 2005
Posts: 713

Kudos [?]: 26 [0], given: 0

### Show Tags

04 May 2006, 09:49
kuristar wrote:
Mixture A is 15% alcohol, and mixture B is 50% alcohol. If the two are poured together to create a 4 gallon mixture that contains 30 percent alcohol, approximately how many gallons of mixture A are in the mixture?

A. 1.5
B. 1.7
C. 2.3
D. 2.5
E. 3

I ll go with C
I used the approach that ancient merchants used for mixtures))
Hope this helps

here we go
15mix A 20parts of mixture A
/
/
30 final mix
\
\
50 mix B 15parts of mixture B
just draw the following scheme
4 gallons of final mixture contains of 35 parts so 1 part of mixture is 4/35
we have 20 parts of mixture A hence (4/35)*20=80/35 or 2.3
C for me
_________________

IE IMBA 2010

Kudos [?]: 26 [0], given: 0

Manager
Joined: 13 Apr 2006
Posts: 56

Kudos [?]: 14 [0], given: 0

### Show Tags

04 May 2006, 09:53
How did you get the parts per mixture (A, B respectively)?

Thanks!

Kudos [?]: 14 [0], given: 0

Director
Joined: 16 Aug 2005
Posts: 937

Kudos [?]: 30 [0], given: 0

Location: France

### Show Tags

04 May 2006, 09:58
let A be x gallons, B is (4-x) gallons

0.15x + 0.5(4-x) = 0.3 * 4
0.15x + 2 - 0.50x = 1.2

Solving for x,
x = 2.3

Kudos [?]: 30 [0], given: 0

Manager
Joined: 13 Apr 2006
Posts: 56

Kudos [?]: 14 [0], given: 0

### Show Tags

04 May 2006, 10:07
Thanks, now it seems obvious (of course!).

Kudos [?]: 14 [0], given: 0

Director
Joined: 10 Oct 2005
Posts: 713

Kudos [?]: 26 [0], given: 0

### Show Tags

04 May 2006, 10:10
kuristar wrote:
How did you get the parts per mixture (A, B respectively)?

Thanks!

we have 30 percent final mixture that contains mixture A and B
to figure out the parts per mixture use the scheme above as follows
we subtract the smaller from larger 50-30 =20 this is parts of mixture A
and for mixture B we subtract 15 from 30 cause it is smaller now we have 15parts of mixture B
Not sure that it is the good explanation but English is not my firt language))

try this approach it really works

lets check
for example we need to get 45 percent mixture of alchohol
we have mixt A 20 percent alc
and mixt B 65 percent alc

using scheme
20--- 20 parts of mixt A
/
45
\
65--- 25 parts of mixt B in final mixture
_________________

IE IMBA 2010

Kudos [?]: 26 [0], given: 0

Manager
Joined: 13 Apr 2006
Posts: 56

Kudos [?]: 14 [0], given: 0

### Show Tags

04 May 2006, 10:29
Got it. thanks, would have never thought of it that way.

Kudos [?]: 14 [0], given: 0

04 May 2006, 10:29
Display posts from previous: Sort by

# Mixture A is 15% alcohol, and mixture B is 50% alcohol. If

Moderator: chetan2u

 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®.