LSAT 106 | Section 2 | Logical Reasoning: Q19

LR Question 19 Explanation

QUESTION TEXT: Nearly all mail that is correctly addressed arrives at…

QUESTION TYPE: Must be True

FACTS:

1. Correctly addressed mail only takes longer than two days if it is damaged.
2. Yet most mail takes three days or more.

ANALYSIS: We can conclude that most mail is either damaged or incorrectly addressed. And most of that mail must be incorrectly addressed, because only a small portion of correctly addressed mail is late (and therefore damaged). So almost all of the late mail must have been incorrectly addressed.

___________

1. This is unlikely to be true, since most correctly addressed mail arrives within two days, damaged or not.
2. This doesn’t have to be true. Some incorrectly addressed mail might arrive within two days.
3. We don’t know. We’re not told how often mail is late if it’s incorrectly addressed.
4. CORRECT. Only a small proportion of correctly addressed mail fails to arrive within two days. So it must be true that quite a lot of mail is incorrectly addressed, because most mail takes longer than two days.
5. This is false. Most mail takes over two days to arrive.

Recap: The question begins with “Nearly all mail that is correctly addressed arrives at”. It is a Must be True question. Learn how to master LSAT MBT questions on the LSAT Logical Reasoning question types page.