Find all School-related info fast with the new School-Specific MBA Forum

It is currently 23 Jul 2014, 08:32

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Food Num. of calories per kilogram Num. of grams of protein

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 30 Mar 2006
Posts: 27
Location: New Jersey
Followers: 0

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

Food Num. of calories per kilogram Num. of grams of protein [#permalink] New post 09 May 2006, 15:41
Food Num. of calories per kilogram Num. of grams of protein per kilo

S 2,000 150

T 1,500 90


36. The table above gives the number of calories and grams of protein per kilogram of food S and T. If a total of 7 kilograms of S and T are combined to make a certain food mixture, how many kilograms of food S are in the mixture?

(1) The mixture has a total of 12,000 calories.

(2) The mixture has a total of 810 grams of protein


I REALLY NEED A GOOD EXPLAINATION ON THIS ONE.

_________________

Andre Crompton
andre.crompton@cit.com

VP
VP
User avatar
Joined: 29 Dec 2005
Posts: 1351
Followers: 6

Kudos [?]: 27 [0], given: 0

GMAT Tests User
Re: Algebra [#permalink] New post 09 May 2006, 17:06
andrecrompton wrote:
Food Num. of calories per kilogram Num. of grams of protein per kilo

S 2,000 150
T 1,500 90

36. The table above gives the number of calories and grams of protein per kilogram of food S and T. If a total of 7 kilograms of S and T are combined to make a certain food mixture, how many kilograms of food S are in the mixture?

(1) The mixture has a total of 12,000 calories.
(2) The mixture has a total of 810 grams of protein

I REALLY NEED A GOOD EXPLAINATION ON THIS ONE.

the answer should be D.

i. using trail and error, s = 3 and t = 4
= 3x2000+4x1500 = 12,000

i. using the similar approach also s = 3 and t = 4
= 3x150 + 4x 90 = 810

no any other value for s and t satisfy the above constraoints...
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5097
Location: Singapore
Followers: 16

Kudos [?]: 131 [0], given: 0

GMAT Tests User
 [#permalink] New post 09 May 2006, 18:51
Assuming s kg of food S are used, then T would be (7-s)kg.

St1:
2000s + 1500(7-s) = 12,000

We can solve for s to get the amt of food S used. Sufficient.

St2:
150s + 90(7-s) = 810.
Similarly, we can solve for s to get the amount of food S used. Sufficient.

Ans D
Director
Director
avatar
Joined: 16 Aug 2005
Posts: 950
Location: France
Followers: 1

Kudos [?]: 8 [0], given: 0

GMAT Tests User
 [#permalink] New post 10 May 2006, 09:15
Using (1)
2000x + 1500y = 12,000
x + y = 7

We can get x and y, hence sufficient.

Using (2)
Same way we can get x and y. So sufficient

Hence D
Senior Manager
Senior Manager
avatar
Joined: 29 Jun 2005
Posts: 403
Followers: 1

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

GMAT Tests User
 [#permalink] New post 10 May 2006, 23:15
Hi,
Agree with D, because:

Statement 1 is sufficient: suppose x is number of kg of S and y is number of kg of K
2000*x+1500*y=12000
x+y=7, combining both equation we can find x and y

Statement 2 is sufficient: 150*x+ 90*y=810, x+y=7. We can find x.
  [#permalink] 10 May 2006, 23:15
    Similar topics Author Replies Last post
Similar
Topics:
3 Experts publish their posts in the topic Finding Factors of Large Nums amenewyork 9 02 Mar 2010, 12:21
GMATPrep DS Num Prop ikk102 4 20 Aug 2007, 14:55
PS - Num Prop (GMATPrep) nick_sun 3 13 Jul 2007, 03:30
S has 2,000 calories per kilogram, and 150 grams of protien Tuneman 3 21 Feb 2007, 13:26
) Food Number of Calories per Kiologram Number of Gram of Raghavender 4 03 Oct 2006, 04:24
Display posts from previous: Sort by

Food Num. of calories per kilogram Num. of grams of protein

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.