Free LSAT Practice
LSAT Practice Test
LSAT Practice Test Videos
eBook: The Road to 180
Law School Top 100
LSAT Test Proctor
LSAT Logic Games
Apple App Store
Digital LSAT Simulator
Campus Rep Internship
Fee Waiver Scholarship
LSAT Test Dates
LSAT Message Board
June 2016 LSAT
Resident: Data indicates that 30 percent of the houses in our town have indaequate site drainage and 30 percent have ...
on November 11 at 10:15PM
I thought this was a percent flaw.
on November 12 at 02:55AM
You have a point, the flaw in this question is a misuse of percentages. However, it may be a different flaw than you expected. The error in this statement is that it fails to account for houses that have both problems - inadequate drainage and structural defects.
I'll input some numbers to explain.
Let's say there are 100 houses in the town.
Houses with only Structural Defects: 25
Houses with only Inadequate drainage: 25
Houses with both: 5
What percentage of houses have structural defects? 30/100 or 30%
What percentage of houses have inadequate drainage? 30/100 or 30%
What percentage of houses have some kind of problem? 55/100 or 55%
This proves that the conclusion is not necessarily true. It could be less than 60%. The resident in the stimulus assumed that these problems cannot overlap.
Posting to the forum is only allowed for members with active accounts.