On average, the number of speeding tickets issued in County : GMAT Critical Reasoning (CR)
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On average, the number of speeding tickets issued in County

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On average, the number of speeding tickets issued in County [#permalink]

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28 Apr 2012, 20:13
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On average, the number of speeding tickets issued in County X every year is three times
greater than the number of speeding tickets issued in County Y during the same period.
Therefore, the number of people who exceed the speed limit must be higher in County X
than in County Y. Which of the following describes a flaw in the reasoning above?
A) The argument fails to take into account that the speed limit may be different in the two
counties.
b) The argument fails to take into account that the number of tickets issued in County X may
reflect a lower proportion of drivers overall in that county.
c) The argument fails to take into account that a single driver can receive more than one ticket
in a given year.
d) The argument fails to take into account that residents of County Y may be more law-abiding
overall.
e) The argument fails to take into account that residents of County X may not be aware of the
speed limit in that county.

[Reveal] Spoiler: OA

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Re: CR - Weaken - # 6 [#permalink]

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07 May 2012, 09:42
It is a clear C. Since a person can rec'd more than one ticket, the total ticket might not reflect the total number of people.
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Re: CR - Weaken - # 6 [#permalink]

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07 May 2012, 19:00
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mohankumarbd wrote:
On average, the number of speeding tickets issued in County X every year is three times
greater than the number of speeding tickets issued in County Y during the same period.
Therefore, the number of people who exceed the speed limit must be higher in County X
than in County Y. Which of the following describes a flaw in the reasoning above?

AVERAGE and PERCENTAGES are important signal in the CR arguments.
Read the question steam again and see how premise in based on "average statistics" and the conclusion in based on "number of people"

c) The argument fails to take into account that a single driver can receive more than one ticket
in a given year.

Option C weaken this jump from average statistics to actual number of people by saying that a singular could receive 1000's of tickets which pushes up the average tickets while the number of people received the tickets reamains 1.

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Re: CR - Weaken - # 6 [#permalink]

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07 May 2012, 21:48
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On average, the number of speeding tickets issued in County X every year is three times greater than the number of speeding tickets issued in County Y during the same period.
Therefore, the number of people who exceed the speed limit must be higher in County X than in County Y.

Which of the following describes a flaw in the reasoning above?

A) The argument fails to take into account that the speed limit may be different in the two
counties. IRRELEVANT - Immediately eliminate

b) The argument fails to take into account that the number of tickets issued in County X may
reflect a lower proportion of drivers overall in that county. Last option to be eliminated - This would be relevant if the conclusion was "People are country X are drive rashly as compared to people in country Y" or something similar to this.

c) The argument fails to take into account that a single driver can receive more than one ticket
in a given year.CORRECT ANSWER - If a single driver receives more than 1 ticket then the conclusion may not be true. For eg-
Number of Tickets - Country X = 10
Number of Tickets - Country Y = 5
Number of People who got Tickets in Country X - 1 (same person got ticket 10 times)
Number of People who got Tickets in Country Y - 5 (all tickets to different people)
In this case, the conclusion will not be true and this option points out this flaw.

d) The argument fails to take into account that residents of County Y may be more law-abiding
overall. - IRRELEVANT - Immediately eliminate

e) The argument fails to take into account that residents of County X may not be aware of the
speed limit in that county. - IRRELEVANT - Immediately eliminate
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Re: On average, the number of speeding tickets issued in County [#permalink]

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01 Sep 2013, 23:09
The author concludes that the number of people who exceed the speed limit in
County X must be higher than the number who exceed the speed limit in County
Y on the grounds that the number of tickets issued in County X is higher. The
author wrongly assumes that every ticket corresponds to a different individual. It
is possible, for example, that a handful of people routinely exceed the speed limit
and are thus responsible for a disproportionate share of the tickets issued in the
county.
(A) Any difference in speed limits is irrelevant to the conclusion.
(B) The conclusion is about actual numbers, not percentages.
(C) CORRECT. This points out the author's unwarranted assumption that every
ticket corresponds to a different individual.
(D) Whether the residents of County Y break other laws is irrelevant to this
specific issue.
(E) Whether the residents of County X are aware that they are exceeding the
speed limit is irrelevant to this specific issue.
Re: On average, the number of speeding tickets issued in County   [#permalink] 01 Sep 2013, 23:09
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