PrepTest 138
[lcid:3651] Prep Test 138 LSAT — Logical Reasoning — S4
Logical reasoning
Question prompt
Students from outside the
Remaining source text redacted.
Why the credited answer is right
Credited answer: E
The notes below walk through why it fits the stem and how to eliminate the rest.
Argument or Facts
Facts
Valid or Flawed
NA
Question Type
Must Be True Questions
Stimulus Summary
Central Markland College: Out-of-province students pay 2x the tuition of in-province students Traditionally ? out-of-province students Over past decade - Out-of-province students have dropped to 40% while academic standards have risen
Answer Anticipation
First, a little math, since the stimulus here is mean and gives us a fraction and a percent. ? is about 67%. So the out-of-province students dropped from 67% to 40%. These numbers themselves aren’t important - but it is important to know that the ? is significantly higher than the 40%. It just might be helpful to have these in our head. With that noted, we’re trying to draw an inference here. It does seem as if there’s a higher proportion of in-state students paying half the tuition, the total amount of tuition being collected would go down, but that assumes that the student body didn’t change in size significantly. It’s possible that Central Markland became a bigger college while also increasing standards somehow, so we have to be careful about answers that speak to numbers. Short version of this? The stimulus is about percents, so we can’t draw inferences about amounts! We also need to be careful about causality. We know that the shift in the student body happened as academic standards have risen, but there’s no statement causally linking those two. So we know what to eliminate as trap answers, but what about what we can actively look for? Well, that’s a little fuzzier, so let’s head to the answer choices and see if we can find something that lines up with the information presented.
Answer choices
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AIf it had not Remaining source text redacted.
Why choice A is not credited
This is a common incorrect answer in Must be True questions. For the most part, we can’t infer what would have happened in a different world - any number of things could have happened differently! -
BIf academic standards had Remaining source text redacted.
Why choice B is not credited
Similar to (A), we don’t know what would have happened in an alternative reality, so this answer is unsupported. -
COver the past 10 Remaining source text redacted.
Why choice C is not credited
This is one of the two trap answers that we anticipated. We know that the ratio of in- and out-of-province students changed, but without knowing that the overall student body stayed the same size, we can’t draw an inference about the sizes of each individual group. -
DOver the past 10 Remaining source text redacted.
Why choice D is not credited
There’s no discussion of any other college in Markland, nor is there any superlative language used that would let us compare Central Markland with others despite not specifically mentioning them, so this answer is unsupported. -
EIf the college's per Remaining source text redacted.
Why choice E matches the stem
First, note that this answer doesn’t change something we know happened as (A) and (B) did - it instead puts a qualification on which the answer is conditioned. Second, it doesn’t make the mistake of (C) in talking about the student body size since it talks about per capita revenue, not overall revenue. With that noted, we should fully consider this answer. We know that the student ratio has skewed away from the higher-paying out-of-province students to the lower-paying in-province students. If, however, the average (“per capita”) tuition has remained the same while this shift to the lower-paying students has happened, it must be the case that tuition has, overall, gone up. If not, the shift to the lower-paying students should have resulted in lower per capita revenue from tuition. This answer is therefore supported by the stimulus and is correct.
What this tests
Discussion
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