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# The city s center for disease control reports that the

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The city s center for disease control reports that the [#permalink]

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14 Jul 2010, 12:29
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The city’s center for disease control reports that the rabies epidemic is more serious now than it was two years ago: two years ago less than 25 percent of the local raccoon population was infected, whereas today the infection has spread to more than 50 percent of the raccoon population. However, the newspaper reports that whereas two years ago 32 cases of rabid raccoons were confirmed during a 12-month period, in the past 12 months only 18 cases of rabid raccoons were confirmed.
Which one of the following, if true, most helps to resolve the apparent discrepancy between the two reports?
(A) The number of cases of rabies in wild animals other than raccoons has increased in the past 12 months.
(B) A significant proportion of the raccoon population succumbed to rabies in the year before last.
(C) The symptoms of distemper, another disease to which raccoons are susceptible, are virtually identical to those of rabies.
(D) Since the outbreak of the epidemic, raccoons, which are normally nocturnal, have increasingly been seen during daylight hours.
(E) The number of confirmed cases of rabid raccoons in neighboring cities has also decreased over the past year.

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[Reveal] Spoiler: OA

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14 Jul 2010, 21:54
PREMISE 1:The city’s center for disease control reports that the rabies epidemic is more serious now than it was two years ago:
PREMISE 2:two years ago less than 25 percent of the local raccoon population was infected, whereas today the infection has spread to more than 50 percent of the raccoon population.
PREMISE 3:However, A significant proportion of the raccoon population succumbed to rabies in the year before last, the newspaper reports that whereas two years ago 32 cases of rabid raccoons were confirmed during a 12-month period, in the past 12 months only 18 cases of rabid raccoons were confirmed

B) A significant proportion of the raccoon population succumbed to rabies in the year before last- CORRECT
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15 Jul 2010, 06:54
tryingharder wrote:
PREMISE 1:The city’s center for disease control reports that the rabies epidemic is more serious now than it was two years ago:
PREMISE 2:two years ago less than 25 percent of the local raccoon population was infected, whereas today the infection has spread to more than 50 percent of the raccoon population.
PREMISE 3:However, A significant proportion of the raccoon population succumbed to rabies in the year before last, the newspaper reports that whereas two years ago 32 cases of rabid raccoons were confirmed during a 12-month period, in the past 12 months only 18 cases of rabid raccoons were confirmed

B) A significant proportion of the raccoon population succumbed to rabies in the year before last- CORRECT

?
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15 Jul 2010, 07:19
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15 Jul 2010, 09:17
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The point to be noted here is that the percentage is increasing and the actual numbers are decreasing.
This is possible only if the population (of which the percentage is mentioned) has decreased over the years.
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18 Jul 2010, 10:17
noboru wrote:
tryingharder wrote:
PREMISE 1:The city’s center for disease control reports that the rabies epidemic is more serious now than it was two years ago:
PREMISE 2:two years ago less than 25 percent of the local raccoon population was infected, whereas today the infection has spread to more than 50 percent of the raccoon population.
PREMISE 3:However, A significant proportion of the raccoon population succumbed to rabies in the year before last, the newspaper reports that whereas two years ago 32 cases of rabid raccoons were confirmed during a 12-month period, in the past 12 months only 18 cases of rabid raccoons were confirmed

B) A significant proportion of the raccoon population succumbed to rabies in the year before last- CORRECT

?

(A) The number of cases of rabies in wild animals other than raccoons has increased in the past 12 months>>not concerned about wild animals
(B) A significant proportion of the raccoon population succumbed to rabies in the year before last>>correct by POE
(C) The symptoms of distemper, another disease to which raccoons are susceptible, are virtually identical to those of rabies>>the no of rabies infected raccoons cud increase if the no of actually distemper infected raccoons are spoted as rabies infected. The no. of rabies infected raccoons cud decrease if the no of actually rabies infected raccoons are spoted as distemper infected. The increase or decrease in rabies population is fictitious. There4 this option can be ruled out since both possibilities exist.
(D) Since the outbreak of the epidemic, raccoons, which are normally nocturnal, have increasingly been seen during daylight hours>>absurd, OOS
(E) The number of confirmed cases of rabid raccoons in neighboring cities has also decreased over the past year>>neighbouring cities-Irrelevant
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19 Jul 2010, 05:06
32 cases Vs 18 cases implies that I have to resolve the discrepancy -

25 percent of X (the local raccoon ) > 50 percent of Y (the raccoon population)

X = pop 2 years back
Y = pop one year back

So X >>> Y. Hence we can assume that some of raccoon must have died due to Rabies in the year (X) before last. sweet

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21 Jul 2010, 10:59
B for me.

Disease control department says that 2 years ago the rabies infection was 25%. Today the infection has recahed to 50%

Newpaper report says that 2 years ago 32 cases of rabid raccoons were confirmed but in the past 12 months (1 year) only 18 cases of rabid raccoons were confirmed.

Why is this discrepancy??

The discrepancy exists because a significant proportion of the raccoon population succumbed to rabies in the year before last.
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31 Jul 2010, 14:08
got 1 correct atlast .............B
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12 Sep 2010, 03:20
The raccoon population has to have decreased for the percentage to have increased even though the number of cases has decreased
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12 Sep 2010, 08:01
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seekmba wrote:
B for me.

Disease control department says that 2 years ago the rabies infection was 25%. Today the infection has recahed to 50%

Newpaper report says that 2 years ago 32 cases of rabid raccoons were confirmed but in the past 12 months (1 year) only 18 cases of rabid raccoons were confirmed.

Why is this discrepancy??

The discrepancy exists because a significant proportion of the raccoon population succumbed to rabies in the year before last.

got baffled between B and C ...n choosed C........

superb explaination ... I bugged up in recognising the question type....:D
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12 Sep 2010, 18:09
B
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12 Sep 2010, 19:26
B - used POE.

Posted from my mobile device
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12 Sep 2010, 19:49
+1 for B
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12 Sep 2010, 21:31
clearly B.
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12 Oct 2010, 21:44
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can anyone plz explain y C is incorrect?
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13 Oct 2010, 03:20
B
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26 Oct 2010, 09:34
vagarwal wrote:
The point to be noted here is that the percentage is increasing and the actual numbers are decreasing.
This is possible only if the population (of which the percentage is mentioned) has decreased over the years.

nice and clear. +1
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26 Oct 2010, 10:57
Definitely B
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27 Oct 2010, 14:54
B, but 3 minutes ; [
Re: rabies epidemic   [#permalink] 27 Oct 2010, 14:54

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