LSAT 119 – Section 3 – Question 22

LSAT 119 - Section 3 - Question 22

June 2005

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT119 S3 Q22
+LR
Strengthen +Streng
Math +Math
A
50%
168
B
22%
159
C
5%
159
D
20%
161
E
3%
155
157
164
172
 +Hardest 145.195 +SubsectionEasier

J.Y.’s explanation

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Over the last 10 years, there has been a dramatic increase in the number of people over the age of 65 living in this region. This is evident from the fact that during this time the average age of people living in this region has increased from approximately 52 to 57 years.

Summarize Argument: Phenomenon-Hypothesis
The author concludes that over the last 10 years, there has been a significant increase in the number of people over the age of 65 living in the region. This is based on the fact that over the last 10 years, the average age of people living in the region has increased from 52 to 57 years.

Notable Assumptions
The author assumes there’s no other explanation for the increase in average age besides an increase in the number of people over 65 living in the region. This overlooks the possibility that the average age increased simply due to younger people moving out of the region.

A
The number of people in the region under the age of 18 has increased over the last 10 years.
This provides evidence against the explanation that the average age increased due to younger people moving out. If the number of people under 18 went up, but the average still still increased, that strongly suggests there’s a lot more older people.
B
The birth rate for the region decreased significantly over the last 10 years.
If anything, this might weaken the argument by suggesting that we have fewer and fewer younger people in the region (due to fewer births). This would suggest the average age increase might be due simply to having fewer younger people.
C
The total number of people living in the region has decreased over the last 10 years.
This doesn’t tell us whether the decrease in population includes an overall decrease in younger people or in older people. If there are fewer younger people, (C) could end up weakening the argument.
D
The number of people who moved into the region over the last 10 years is greater than the number of those who moved out.
This tells us that the overall population has gone up. But this doesn’t help prove that the overall number of older people has significantly increased. (D) is consistent with very young people moving out and being replaced by a greater number of middle-aged people who aren’t over 65.
E
The average age for people in the region is higher than that for people in surrounding regions.
The argument is concerned with whether the average age increase in this reason allows us to conclude that this region has a greater number of people over 65. Other regions don’t affect this argument.

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LSAT PrepTest 119 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Logical Reasoning

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