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Assumption Revision: To decrease the number of crimes

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Assumption Revision: To decrease the number of crimes [#permalink]

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This question is part of the GMAT Club Critical Reasoning : Assumption" Revision Project.

To decrease the number of crimes in city Y, the city’s Police Commissioner proposed taking some police officers from low-crime districts of the city and moving them to high-crime districts of the city. His proposal is based on city Y crime data that show that the number of crimes in any district of the city decreases when additional police officers are moved into that district. The Police Commissioner’s proposal depends on which of the following assumptions?

• City X experienced a drastic reduction in crime after implementing a proposal similar to that proposed by the Police Commissioner of city Y.

• The severity of crimes committed in any district of the city decreases when additional police officers are moved into that district.

• The number of crimes committed in all high-crime districts of city Y is more than triple the number of crimes committed in all low-crime districts of city Y.

• There are more low-crime districts than high-crime districts in city Y.

• Districts of the city from which police officers are removed do not experience significant crime increases shortly after the removal of those officers.
[Reveal] Spoiler: OA

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Assumption Revision: To decrease the number of crimes [#permalink]

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To decrease the number of crimes in city Y, the city’s Police Commissioner proposed taking some police officers from low-crime districts of the city and moving them to high-crime districts of the city. His proposal is based on city Y crime data that show that the number of crimes in any district of the city decreases when additional police officers are moved into that district. The Police Commissioner’s proposal depends on which of the following assumptions?

• City X experienced a drastic reduction in crime after implementing a proposal similar to that proposed by the Police Commissioner of city Y.
closest to be a wrong ans. there is no talk of city X as the data talks of only city Y
• The severity of crimes committed in any district of the city decreases when additional police officers are moved into that district.
scope shift. it talks of severity not number

• The number of crimes committed in all high-crime districts of city Y is more than triple the number of crimes committed in all low-crime districts of city Y.
nothing related to numbers.. triple?

• There are more low-crime districts than high-crime districts in city Y.
out of scope

• Districts of the city from which police officers are removed do not experience significant crime increases shortly after the removal of those officers.
Correct... the assumption is the areas will not be susceptible to more crime if officers are pulled out

ans E
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Re: Assumption Revision: To decrease the number of crimes [#permalink]

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The answer is E. If districts from where officers were removed will suffer from high crime, then overall criminal level of the city won't be affected.
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Re: Assumption Revision: To decrease the number of crimes [#permalink]

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New post 24 Feb 2015, 15:30
A plan will succeed if the solution doesn't inherently create further problems. So the olan is to remove officers from one place to another. Doing so will resuce crime in area that receive additional officers but at the same time won't cause more crime in the area from which offficers are removed.
Option e says the same thing

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Re: Assumption Revision: To decrease the number of crimes [#permalink]

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The Police Commissioner's proposal hopes to decrease the number of crimes in
city Y by shifting police officers from low-crime to high-crime districts. His
proposal is based on data that demonstrate that crime decreases when
additional police officers are moved into a district. However, the data do not
mention anything about the effect on the districts from which the police officers
were removed. The commissioner's plan is based on the assumption that the
movement of police officers will not have any adverse effects on the low-crime
districts.

(A) While it is encouraging that a similar plan worked successfully in City X, this
fact is certainly not essential for the success of the plan in City Y. The cities may
be so different as to make the comparison meaningless.

(B) The police commissioner's proposal is focused solely on decreasing the
number of crimes in city Y. The severity of the crimes has no bearing on whether
the commissioner's proposal will succeed or not.

(C) The actual numerical distinction between high and low-crime areas of the city
is immaterial to the commissioner's proposal. For instance, if the number of
crimes committed in all high crime districts was only double (instead of more than
triple) the number of crimes committed in low crime districts, the proposal could
still be valid.

(D) It would be practically beneficial to the commissioner's plan if there were
more low crime than high crime districts in city Y. This would enable the
movement of police officers to every high crime district. However, this is not
necessary to achieve the commissioner's goal of decreasing the total number of
crimes in city Y. Even if there were more high-crime districts than low-crime
districts in city Y, police officers could still be shifted to some (though not all)
high-crime districts, and thereby possibly reduce the total number of crimes in
city Y.

(E) CORRECT. The police commissioner's proposal would not make sense if
districts of the city from which police officers are removed experience significant
crime increases shortly after the removal of those officers. This would at least
partially, if not fully, negate the reduction in the number of crimes in the highcrime
districts. This choice establishes that, in fact, the low-crime districts do
NOT suffer from significant crime increases after the removal of some officers--
an essential assumption upon which the commissioner's proposal depends.
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Re: Assumption Revision: To decrease the number of crimes [#permalink]

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New post 25 Aug 2017, 14:25
Answer : E

• City X experienced a drastic reduction in crime after implementing a proposal similar to that proposed by the Police Commissioner of city Y. (This option can be utilized as a strengthner

• The severity of crimes committed in any district of the city decreases when additional police officers are moved into that district.(The paragraph discussed about number of crimes to number of police and not the severity of crimes)

• The number of crimes committed in all high-crime districts of city Y is more than triple the number of crimes committed in all low-crime districts of city Y.(The para does not provides comparison of the high and low crime areas)

• There are more low-crime districts than high-crime districts in city Y.(The para does not provides comparison of the high and low crime areas)

• Districts of the city from which police officers are removed do not experience significant crime increases shortly after the removal of those officers.(This assumption is a permanent solution to reduce crime in City Y

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Re: Assumption Revision: To decrease the number of crimes   [#permalink] 25 Aug 2017, 14:25
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