GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video
close
It is currently 10 May 2021, 17:42
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
New comers' posts

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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel
If the average weight of the chickens on Farm One is 12
9 posts Go to First Unread Post
Print view
NEW TOPIC
POST REPLY
Downloads
My Bookmarks
Reviews
SORT BY:
Date
Kudos
Tags:
Find Similar Topics 

Show Tags
Hide Tags

User avatar
P
Gnpth
VP
VP
Joined: 29 Aug 2012
Status:Chasing my MBB Dream!
Posts: 1091
Location: United States (DC)
WE:General Management (Aerospace and Defense)
GMAT ToolKit User Reviews Badge
If the average weight of the chickens on Farm One is 12 [#permalink] New post  15 Jul 2014, 22:58
3
Bookmarks
00:00
A
B
C
D
E

Difficulty:

5% (low)

Question Stats:

87% (01:26) correct 13% (01:02) wrong based on 131 sessions

Hide Show timer Statistics

If the average weight of the chickens on Farm One is 12 pounds, how many chickens are there on Farm Two?

(1) The average weight of the chickens on Farm Two is 13 pounds.

(2) The total weight of the chickens on Farm Two is 6 pounds less than the total weight of the chickens on Farm One.
ShowHide Answer
Official Answer
Official Answer and Stats are available only to registered users. Register/Login.

_________________
Become a GMAT Club Premium member to unlock discounts

MBA, Class of 2020,
McDonough School of Business
Signature Read More
avatar
MyRedemption
Intern
Intern
Joined: 13 Aug 2013
Posts: 18
Re: If the average weight of the chickens on Farm One is 12 [#permalink] New post  15 Jul 2014, 23:08
Let x be the number of chicken in farm 1 and y be the number of chicken in farm 2.

statement 1 : avg. wt of chicken in farm 1 =13 pounds. (insufficient)
statement 2: insufficient in itself.

combine both : 12x-13y=6. By hit and trial x=7 and y=6 satisfies. (went a little further, couldn't come up with any more values of x and y which would satisfy this equation) hence, farm 2 has 6 chicken.
User avatar
P
Gnpth
VP
VP
Joined: 29 Aug 2012
Status:Chasing my MBB Dream!
Posts: 1091
Location: United States (DC)
WE:General Management (Aerospace and Defense)
GMAT ToolKit User Reviews Badge
If the average weight of the chickens on Farm One is 12 [#permalink] New post  15 Jul 2014, 23:22
1
Bookmarks
MyRedemption wrote:

combine both : 12x-13y=6.


You were close, But made mistake here.

The statement 2 says that the TOTAL weight of Chicken in farm 2 is 6 less than the TOTAL weight of Chicken in farm 1. So the above method you used is wrong. As 12 and 13 are the AVERAGE weight of the chickens in the respective farms, not total weight.

Official Explanation :

We need to find the number of chicken in farm 2(N2)

(1) Average weight is 13. So as per the average formula we know that

\(13 = \frac{Total (T2)}{N2}\)

No enough info, so in sufficient.

(2) As per the statement T2= T1-6

Since we dont know the total weight of chicken in farm 1- Insufficient.

Combining (1) & (2),

\(Average = \frac{T2}{N2}\)

We know T2= T1-6, when we substitute.

\(13= \frac{(T1-6)}{N2}\)

Since we still don't know the total weight(T1) of the chickens in the farm 1. So both statement together are not sufficient.

Answer is E.
_________________
Become a GMAT Club Premium member to unlock discounts

MBA, Class of 2020,
McDonough School of Business
Signature Read More
avatar
MyRedemption
Intern
Intern
Joined: 13 Aug 2013
Posts: 18
Re: If the average weight of the chickens on Farm One is 12 [#permalink] New post  15 Jul 2014, 23:29
The average weight of chicken in farm 1 is given as 12 pounds and i have considered x chicken in total. SO total weight should be 12x. what is the flaw in this?
User avatar
P
Gnpth
VP
VP
Joined: 29 Aug 2012
Status:Chasing my MBB Dream!
Posts: 1091
Location: United States (DC)
WE:General Management (Aerospace and Defense)
GMAT ToolKit User Reviews Badge
If the average weight of the chickens on Farm One is 12 [#permalink] New post  16 Jul 2014, 00:45
MyRedemption wrote:
The average weight of chicken in farm 1 is given as 12 pounds and i have considered x chicken in total. SO total weight should be 12x. what is the flaw in this?


Oh ok. My mistake

In DS we just need to find whether the two given statement are sufficient to find the answer. We don't have to plug in. If at all we do that, we may have different values for X and Y.

In this problem, we still don't know the total value of chicken in farm 1. Hence we are not able to find the number of chicken in farm 2. So E.
_________________
Become a GMAT Club Premium member to unlock discounts

MBA, Class of 2020,
McDonough School of Business
Signature Read More
User avatar
V
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 74664
CAT Tests Top Member of the Month
Re: If the average weight of the chickens on Farm One is 12 [#permalink] New post  16 Jul 2014, 00:48
Expert Reply
MyRedemption wrote:
The average weight of chicken in farm 1 is given as 12 pounds and i have considered x chicken in total. SO total weight should be 12x. what is the flaw in this?


Nothing wrong. You should find x. How are you going to do that?
_________________
New to the GMAT CLUB Forum?
Posting Rules: QUANTITATIVE | VERBAL. Guides and Resources: QUANTITATIVE | VERBAL | Ultimate GMAT Quantitative Megathread | All You Need for Quant

Questions' Banks and Collection:
PS: Standard deviation | Tough Problem Solving Questions With Solutions | Probability and Combinations Questions With Solutions | Tough and tricky exponents and roots questions | 12 Easy Pieces (or not?) | Bakers' Dozen | Algebra set | Mixed Questions | Fresh Meat
DS: DS Standard deviation | Inequalities | 700+ GMAT Data Sufficiency Questions With Explanations | Tough and tricky exponents and roots questions | The Discreet Charm of the DS | Devil's Dozen!!! | Number Properties set | New DS set
MIXED: GMAT Club's Complete Questions' Bank | SEVEN SAMURAI OF 2012 | Tricky questions from previous years. | Special Questions' Directory | Best Of The Best Of 2017 | The Best Of Quant of 2016 | 20 hardest and 20 best questions of 2015 | 15 best topics of 2015 | Seven Samurai of 2012 | GMAT Probability Questions

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics
Signature Read More
User avatar
V
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 74664
CAT Tests Top Member of the Month
Re: If the average weight of the chickens on Farm One is 12 [#permalink] New post  16 Jul 2014, 00:50
3
Kudos
Expert Reply
MyRedemption wrote:
If the average weight of the chickens on Farm One is 12 pounds, how many chickens are there on Farm Two?

(1) The average weight of the chickens on Farm Two is 13 pounds.

(2) The total weight of the chickens on Farm Two is 6 pounds less than the total weight of the chickens on Farm One.

Let x be the number of chicken in farm 1 and y be the number of chicken in farm 2.

statement 1 : avg. wt of chicken in farm 1 =13 pounds. (insufficient)
statement 2: insufficient in itself.

combine both : 12x-13y=6. By hit and trial x=7 and y=6 satisfies. (went a little further, couldn't come up with any more values of x and y which would satisfy this equation) hence, farm 2 has 6 chicken.


There are other solutions. For example, x=20 and y=18.
_________________
New to the GMAT CLUB Forum?
Posting Rules: QUANTITATIVE | VERBAL. Guides and Resources: QUANTITATIVE | VERBAL | Ultimate GMAT Quantitative Megathread | All You Need for Quant

Questions' Banks and Collection:
PS: Standard deviation | Tough Problem Solving Questions With Solutions | Probability and Combinations Questions With Solutions | Tough and tricky exponents and roots questions | 12 Easy Pieces (or not?) | Bakers' Dozen | Algebra set | Mixed Questions | Fresh Meat
DS: DS Standard deviation | Inequalities | 700+ GMAT Data Sufficiency Questions With Explanations | Tough and tricky exponents and roots questions | The Discreet Charm of the DS | Devil's Dozen!!! | Number Properties set | New DS set
MIXED: GMAT Club's Complete Questions' Bank | SEVEN SAMURAI OF 2012 | Tricky questions from previous years. | Special Questions' Directory | Best Of The Best Of 2017 | The Best Of Quant of 2016 | 20 hardest and 20 best questions of 2015 | 15 best topics of 2015 | Seven Samurai of 2012 | GMAT Probability Questions

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics
Signature Read More
avatar
MyRedemption
Intern
Intern
Joined: 13 Aug 2013
Posts: 18
Re: If the average weight of the chickens on Farm One is 12 [#permalink] New post  16 Jul 2014, 01:40
Yes I tried for other values also. And x=20, y=18 is also a solution. Hence, E. ( I would go with E because of this reason)
User avatar
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 18990
Re: If the average weight of the chickens on Farm One is 12 [#permalink] New post  19 Mar 2021, 06:42
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources
Signature Read More
GMAT Club Bot
gmatclubot
Re: If the average weight of the chickens on Farm One is 12 [#permalink]
19 Mar 2021, 06:42
NEW TOPIC
POST REPLY
Downloads
My Bookmarks
Reviews
Moderators:
chetan2u
Math Expert
9818 posts
Bunuel
Math Expert
74664 posts
GMATBusters
Retired Moderator
1991 posts
nick1816
DS Forum Moderator
2267 posts

cron

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions