|
Author |
Message |
|
TAGS:
|
|
|
VP
Joined: 18 May 2008
Posts: 1305
Followers: 9
Kudos [?]:
57
[0], given: 0
|
Of the goose eggs laid at a certain pond, 2/3 hatched, and [#permalink]
 20 Jun 2008, 00:38
Question Stats:
25% (00:00) correct
75% (00:22) wrong based on 0 sessions
Of the goose eggs laid at a certain pond, 2/3 hatched, and 3/4 of the geese that hatched from those eggs survived the first month. Of the geese that survived the first month, 3/5 did not survive the first year. If 120 geese survived the first year and if no more than one goose hatched from each egg, how many goose eggs were laid at the pond?
A. 280
B. 400
C. 540
D. 600
E. 840
I tried solving it in this way
Let total eggs laid=x
then x*(2/3)*(3/4)*(3/5) is the no of eggs who didnt survive
so eggs who survived= x-3x/10=120
this doesnt give answer.
|
|
|
|
|
|
|
Manager
Joined: 24 Apr 2008
Posts: 163
Followers: 1
Kudos [?]:
33
[1] , given: 0
|
Re: PS: goose eggs [#permalink]
20 Jun 2008, 00:44
1
This post received
KUDOS
Based on the Q stem if total eggs were X then 3/4x2/3x2/5xX=120
Ans: 600
|
|
|
|
|
|
Intern
Joined: 09 Jun 2008
Posts: 9
Followers: 0
Kudos [?]:
0
[0], given: 0
|
Re: PS: goose eggs [#permalink]
20 Jun 2008, 01:14
ritula wrote: Of the goose eggs laid at a certain pond, 2/3 hatched, and 3/4 of the geese that hatched from those eggs survived the first month. Of the geese that survived the first month, 3/5 did not survive the first year. If 120 geese survived the first year and if no more than one goose hatched from each egg, how many goose eggs were laid at the pond?
A. 280
B. 400
C. 540
D. 600
E. 840
I tried solving it in this way
Let total eggs laid=x
then x*(2/3)*(3/4)*(3/5) is the no of eggs who didnt survive
so eggs who survived= x-3x/10=120
this doesnt give answer. your ratios are wrong. they should be 1/3, 1/4 and 3/5
|
|
|
|
|
|
Senior Manager
Joined: 29 Aug 2005
Posts: 285
Followers: 1
Kudos [?]:
20
[0], given: 0
|
Re: PS: goose eggs [#permalink]
20 Jun 2008, 01:31
ritula wrote: Of the goose eggs laid at a certain pond, 2/3 hatched, and 3/4 of the geese that hatched from those eggs survived the first month. Of the geese that survived the first month, 3/5 did not survive the first year. If 120 geese survived the first year and if no more than one goose hatched from each egg, how many goose eggs were laid at the pond?
A. 280
B. 400
C. 540
D. 600
E. 840
I tried solving it in this way
Let total eggs laid=x
then x*(2/3)*(3/4)*(3/5) is the no of eggs who didnt survive
so eggs who survived= x-3x/10=120
this doesnt give answer. IMO D My approach let the total number of eggs laid be x 2/3 hathced = 2x/3 and 3/4 of the geese that hatched from those eggs survived the first month = x/2 Of the geese that survived the first month, 3/5 did not survive the first year(number who survived) = x/5 which is equal to 120 therefore x = 600 HTH
_________________
The world is continuous, but the mind is discrete
|
|
|
|
|
|
Senior Manager
Joined: 07 Feb 2008
Posts: 317
Followers: 1
Kudos [?]:
23
[0], given: 1
|
Re: PS: goose eggs [#permalink]
20 Jun 2008, 06:52
ritula wrote: Of the goose eggs laid at a certain pond, 2/3 hatched, and 3/4 of the geese that hatched from those eggs survived the first month. Of the geese that survived the first month, 3/5 did not survive the first year. If 120 geese survived the first year and if no more than one goose hatched from each egg, how many goose eggs were laid at the pond?
A. 280
B. 400
C. 540
D. 600
E. 840
I tried solving it in this way
Let total eggs laid=x
then x*(2/3)*(3/4)*(3/5) is the no of eggs who didnt survive
so eggs who survived= x-3x/10=120
this doesnt give answer. I got D. let t bee the total number of eggs laid. Of the tatal eggs laid, 2/3 hatched therfore 2/3t. 3/4 of the eggs that hatched survived the first month. 3/4 x 2/3t = 1/2t 3/5 did not survive the first year hence 3/5 x 1/2t = 3/10t meaning 2/10t survived. so it says 120 geese = 2/10t. therefore to find the total number of eggs hatched will be 120 x 10/2t which is equal to 600.
|
|
|
|
|
|
Intern
Joined: 18 Jun 2008
Posts: 44
Followers: 0
Kudos [?]:
6
[1] , given: 0
|
Re: PS: goose eggs [#permalink]
20 Jun 2008, 08:17
1
This post received
KUDOS
ritula wrote: 2/3 hatched
3/4 of the geese survived
3/5 did not survive This is a great example of what tricks thrown at you in the GMAT. Read carefully for the "not" modifiers. Not only in the full question, but in the question stem. They are testing more your ability to critically read than your ability to solve math problems.
|
|
|
|
|
|
VP
Joined: 18 May 2008
Posts: 1305
Followers: 9
Kudos [?]:
57
[0], given: 0
|
Re: PS: goose eggs [#permalink]
21 Jun 2008, 10:34
ok now i know wht mistake i was doing. Instead of the last protion, i was negating the whole stem. the OA is D indeed. thanks all for discussion
|
|
|
|
|
|
Manager
Joined: 02 Sep 2010
Posts: 50
WE 1: Business Development Manger
WE 2: Assistant Manager-Carbon Trading
WE 3: Manager-Carbon Trading
Followers: 2
Kudos [?]:
3
[0], given: 16
|
Re: PS: goose eggs [#permalink]
23 Nov 2010, 07:15
You can also back solve this question by picking choices from answers ( makes life easier)
for example pick D =600
600*2/3=400 hatched
400*3/4=300 Survived first month
300*3/5=180 did not survive
Total survived=300-180=120
So we get answer from 600 i.e answer choice D
|
|
|
|
|
|
Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 3109
Location: Pune, India
Followers: 568
Kudos [?]:
2002
[0], given: 92
|
Re: PS: goose eggs [#permalink]
23 Nov 2010, 09:37
ritula wrote: Of the goose eggs laid at a certain pond, 2/3 hatched, and 3/4 of the geese that hatched from those eggs survived the first month. Of the geese that survived the first month, 3/5 did not survive the first year. If 120 geese survived the first year and if no more than one goose hatched from each egg, how many goose eggs were laid at the pond?
A. 280
B. 400
C. 540
D. 600
E. 840
I tried solving it in this way
Let total eggs laid=x
then x*(2/3)*(3/4)*(3/5) is the no of eggs who didnt survive
so eggs who survived= x-3x/10=120
this doesnt give answer. When you face a long text question in GMAT, try reading and analyzing one line at a time rather than trying to make sense of the whole question in a go. This is what I would do: Of the goose eggs laid at a certain pond, 2/3 hatched, and 3/4 of the geese that hatched from those eggs survived the first month.- This means 2/3 *3/4 = 1/2 of the eggs survived the first month. Of the geese that survived the first month, 3/5 did not survive the first year. - This means 3/5 of 1/2 (those who survived first month) i.e. 3/10 did not survive the first year and 2/5 of 1/2 = 1/5 survived the first year. If 120 geese survived the first year and if no more than one goose hatched from each egg, how many goose eggs were laid at the pond?- This means 1/5 calculated above is equal to 120 so total eggs laid were 5*120 = 600. More often than not, by the time you reach the last statement, most of your question would be already solved.
_________________
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: PS: goose eggs
[#permalink]
23 Nov 2010, 09:37
|
|
|
|
|
|
|
|
|
Similar topics |
Author |
Replies |
Last post |
|
Similar
Topics:
|
 |
|
|
In a certain pond, 50 fish were caught, tagged, and returned
|
maverick_ucdc |
2 |
28 Nov 2003, 06:49 |
|
|
|
|
In a certain pond, 50 fish were caught, tagged, and returned
|
SimaQ |
2 |
02 Apr 2006, 02:37 |
|
|
|
|
LAID
|
bmwhype2 |
2 |
05 Sep 2007, 11:25 |
|
|
1
|
 |
In a certain pond, 50 fish were caught, tagged, and returned
|
DeeptiM |
4 |
18 Aug 2011, 11:50 |
|
|
2
|
|
From 2008 to 2009, the number of Easter eggs in a certain
|
Smita04 |
7 |
01 May 2012, 23:15 |
|
|
|
|
|
|
close
