LSAT 103 – Section 1 – Question 11

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Type Tags Answer
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Curve Question
Difficulty
Psg/Game/S
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Explanation
PT103 S1 Q11
+LR
+Exp
Sufficient assumption +SA
Math +Math
A
1%
151
B
91%
165
C
2%
155
D
3%
153
E
3%
154
139
146
153
+Medium 147.884 +SubsectionMedium

Five thousand of the 50,000 books published in country Z in 1991 were novels. Exactly 25 of the films released in country Z in 1992 were based on those novels. Since 100 films were released in country Z in 1992, no more than one-quarter of them were based on books published in country Z in 1991.

Summary
The author concludes that at most 25% of the films released in 1992 were based on books published in 1991. His reasoning is that 25% of the films released in 1992 were based on novels published in 1991.

Missing Connection
The author’s conclusion is about books, but his premise is about novels. What if there were movies based on books (e.g. biographies) that aren’t novels? We need to close this gap in the argument. We could do so by adding the assumption that all movies released in 1992 that were based on 1991 books were based on novels.

A
None of the scripts used in films released in 1992 were written by professional novelists.
This is irrelevant, because the conclusion is about the source material of the films (novels vs. other kinds of books), not the professional background of the screenwriters.
B
None of the films released in country Z in 1992 were based on books other than novels.
This is saying that, if a film based on a book was released in 1992, then it was based on a novel. If so, the 25% of 1992 films based on 1991 novels are the only films based on 1991 books. And the conclusion that 25% is the max percentage of such films is guaranteed.
C
None of the books that were published in country Z in 1992 were based on plots of films released in 1991.
This doesn’t close the gap in the argument: there could still be 1992 films based on 1991 books that aren’t novels. And thus the percentage of 1992 films based on 1991 books could be higher than 25%.
D
Some of the films released in country Z in 1992 were based on older films that had been released for the first time many years earlier.
This doesn’t close the gap in the argument: there could still be 1992 films based on 1991 books that aren’t novels. And thus the percentage of 1992 films based on 1991 books could be higher than 25%.
E
Some of the films released in 1991 in country Z were based on novels that were published in 1991.
The conclusion is about 1992 films, so 1991 films are irrelevant.

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