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A population of game ducks at a western lake contains 55

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Director
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A population of game ducks at a western lake contains 55 [#permalink] New post 09 Oct 2007, 16:33
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C
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E

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A population of game ducks at a western lake contains 55 males to every 45 females, while a population of game ducks at an eastern lake contains 65 males for every 35 females. Among those ducks that have not yet bred there are only slightly more males than females, but among older ducks the number of males greatly exceeds the number of females. Because there are appreciably more males among adult ducks than among young ducks, we can infer that the greater the disparity in overall sex ratios, the greater the percentage of older male ducks in the population.

Which one of the following can be inferred from the passage?

(A) The population of game duck at the western lake contains a lower percentage of adult males than the population at the eastern lake contains.
(B) The population of game duck at the eastern lake contains a higher percentage of nonadult game ducks than the population at the western lake contains.
(C) The total number of male game ducks is higher in the eastern lake’s population than in the western lake population.
(D) The number of nonadult ducks hatched in a breeding season is higher in the eastern lake’s population than in the western lake’s population.
(E) Adult female game ducks outnumber nonadult female game ducks in the eastern lake’s population.

Please explain your answers.
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Re: CR Game ducks [#permalink] New post 09 Oct 2007, 16:49
eyunni wrote:
A population of game ducks at a western lake contains 55 males to every 45 females, while a population of game ducks at an eastern lake contains 65 males for every 35 females. Among those ducks that have not yet bred there are only slightly more males than females, but among older ducks the number of males greatly exceeds the number of females. Because there are appreciably more males among adult ducks than among young ducks, we can infer that the greater the disparity in overall sex ratios, the greater the percentage of older male ducks in the population.

Which one of the following can be inferred from the passage?

(A) The population of game duck at the western lake contains a lower percentage of adult males than the population at the eastern lake contains.
(B) The population of game duck at the eastern lake contains a higher percentage of nonadult game ducks than the population at the western lake contains.
(C) The total number of male game ducks is higher in the eastern lake’s population than in the western lake population.
(D) The number of nonadult ducks hatched in a breeding season is higher in the eastern lake’s population than in the western lake’s population.
(E) Adult female game ducks outnumber nonadult female game ducks in the eastern lake’s population.

Please explain your answers.


A this one is super tricky.. will try to explain

western: 55M to 45M
eastern: 65M to 35M

non breeding ducks M > F slightly
older ducks: M > F greatly

stem says that "the greater the disparity in overall sex ratios, the greater the percentage of older male ducks in the population." this means that for the eastern lake, there is a higher percentage of older male ducks.

looking at answer choices and how i eliminated:

A) this is exactly what is given to us, correct (except saying the other side)

B) we do not know if the eastern lake contains higher percentage of non-adult ducks than the western. older MALE ducks yes but we do not know about the other non-adult males
C) we know that eastern has higher percentage of adult male ducks but we do not know if eastern has a higher total number of male ducks than the western
D) nothing in the argument talks about the breeding season
E) stem says nothing about the female count relationship

Last edited by beckee529 on 09 Oct 2007, 16:59, edited 1 time in total.
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 [#permalink] New post 09 Oct 2007, 16:52
Conclusion: we can infer that the greater the disparity in overall sex ratios, the greater the percentage of older male ducks in the population.

A - Because there is a greater disparity in sex ratios in the eastern lake 65:35 therefore the eastern lake has a higher percentage of adult male ducks then the western lake.
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 [#permalink] New post 09 Oct 2007, 17:00
This one is tough.
Beckee, we don't have the same answer this time. :(
I was between A and C and ended with C. After reading the posts, I agree with A.
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Re: CR Game ducks [#permalink] New post 09 Oct 2007, 17:02
eyunni wrote:
A population of game ducks at a western lake contains 55 males to every 45 females, while a population of game ducks at an eastern lake contains 65 males for every 35 females. Among those ducks that have not yet bred there are only slightly more males than females, but among older ducks the number of males greatly exceeds the number of females. Because there are appreciably more males among adult ducks than among young ducks, we can infer that the greater the disparity in overall sex ratios, the greater the percentage of older male ducks in the population.

Which one of the following can be inferred from the passage?

(A) The population of game duck at the western lake contains a lower percentage of adult males than the population at the eastern lake contains.
(B) The population of game duck at the eastern lake contains a higher percentage of nonadult game ducks than the population at the western lake contains.
(C) The total number of male game ducks is higher in the eastern lake’s population than in the western lake population.
(D) The number of nonadult ducks hatched in a breeding season is higher in the eastern lake’s population than in the western lake’s population.
(E) Adult female game ducks outnumber nonadult female game ducks in the eastern lake’s population.

Please explain your answers.


Elimanted CDE, but guessed B.

Agree w/ A.
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 [#permalink] New post 09 Oct 2007, 17:05
Chose A.
Impact of more eastern adult males would be higher on overall duck population.

Last edited by Juaz on 09 Oct 2007, 17:07, edited 1 time in total.
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 [#permalink] New post 09 Oct 2007, 17:06
This is bit tricky...

will go for 'A'.
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 [#permalink] New post 09 Oct 2007, 17:19
Is this an LSAT question?
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 [#permalink] New post 10 Oct 2007, 05:51
JDMBA wrote:
Is this an LSAT question?


Yes. It is from the CR 1000.
OA is A.
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Re: CR Game ducks [#permalink] New post 24 Oct 2007, 15:56
eyunni wrote:
A population of game ducks at a western lake contains 55 males to every 45 females, while a population of game ducks at an eastern lake contains 65 males for every 35 females. Among those ducks that have not yet bred there are only slightly more males than females, but among older ducks the number of males greatly exceeds the number of females. Because there are appreciably more males among adult ducks than among young ducks, we can infer that the greater the disparity in overall sex ratios, the greater the percentage of older male ducks in the population.

Which one of the following can be inferred from the passage?

(A) The population of game duck at the western lake contains a lower percentage of adult males than the population at the eastern lake contains.
(B) The population of game duck at the eastern lake contains a higher percentage of nonadult game ducks than the population at the western lake contains.
(C) The total number of male game ducks is higher in the eastern lake’s population than in the western lake population.
(D) The number of nonadult ducks hatched in a breeding season is higher in the eastern lake’s population than in the western lake’s population.
(E) Adult female game ducks outnumber nonadult female game ducks in the eastern lake’s population.

Please explain your answers.


Went for A
C,D and E are out
Was stuck between A and B..but then we cannot say anything about the non adult ducks %...there could be a lot of young ducks who knows.

Reason for picking A:
1. Among those ducks that have not yet bred there are only slightly more males than females

2. among older ducks the number of males greatly exceeds the number of females

In both the cases the number of males exceeds the females.
Re: CR Game ducks   [#permalink] 24 Oct 2007, 15:56
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