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Difficulty:
95%
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Question Stats:
47% (01:42) correct
53%
(02:02)
wrong
based on 633
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Ashley and Cassandra drove their cars along the same route for 400 miles and then stopped at a gasoline station, where each purchased exactly the amount of gasoline needed to fill her car's gasoline tank to capacity. If both cars began with full gasoline tanks, which person's car consumed more gasoline during the 400-mile trip?
(1) At the gasoline station, Ashley purchased 10% less gasoline by volume than Cassandra purchased.
(2) The capacity of Ashley's gasoline tank is 15% less than the capacity of Cassandra's gasoline tank.
(1) At the gasoline station, Ashley purchased 10% less gasoline by volume than Cassandra purchased.
(2) The capacity of Ashley's gasoline tank is 15% less than the capacity of Cassandra's gasoline tank.
GMAT Prep Focus - Mock 5
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WhatsApp Image 2023-10-23 at 10.46.14_8cc38725.jpg [ 74.94 KiB | Viewed 11573 times ]
23 Oct 2023, 08:01
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Ashley and Cassandra drove their cars along the same route for 400 miles and then stopped at a gasoline station, where each purchased exactly the amount of gasoline needed to fill her car's gasoline tank to capacity. If both cars began with full gasoline tanks, which person's car consumed more gasoline during the 400-mile trip?
Statement (1)
(1) At the gasoline station, Ashley purchased 10% less gasoline by volume than Cassandra purchased.
We see that both cars began with full tanks. So, the amount of gasoline used by each car must be the same amount needed to fill that car's tank "to capacity" again.
Thus, since, if Ashley purchased less gasoline than Cassandra purchased, Cassandra needed more gasoline to fill her tank, Cassandra must have used more gasoline.
Sufficient.
Statement 2
(2) The capacity of Ashley's gasoline tank is 15% less than the capacity of Cassandra's gasoline tank.
Alone, this information on the relative capacities of the two tanks does not tell us anything about how much gasoline Ashley and Cassandra's cars consumed. After all, a car can consume a larger or smaller amount of fuel per mile regardless of the size of its tank.
Insufficient.
This question is written, with the wording "to capacity" in the question and "capacity" in statement (2), to tempt us to believe that the information on the capacities of the tanks provided by statement (2) is necessary for answering the question and that therefore the correct answer is (C).
However, the truth is that the information on the amount of fuel they purchased provided by statement (1) is sufficient.
Correct Answer
Key takeaway:
The GMAT uses matching wording to create traps to determine whether we understand what's going on in the question or are just going by vibe when choosing an answer.
Statement (1)
(1) At the gasoline station, Ashley purchased 10% less gasoline by volume than Cassandra purchased.
We see that both cars began with full tanks. So, the amount of gasoline used by each car must be the same amount needed to fill that car's tank "to capacity" again.
Thus, since, if Ashley purchased less gasoline than Cassandra purchased, Cassandra needed more gasoline to fill her tank, Cassandra must have used more gasoline.
Sufficient.
Statement 2
(2) The capacity of Ashley's gasoline tank is 15% less than the capacity of Cassandra's gasoline tank.
Alone, this information on the relative capacities of the two tanks does not tell us anything about how much gasoline Ashley and Cassandra's cars consumed. After all, a car can consume a larger or smaller amount of fuel per mile regardless of the size of its tank.
Insufficient.
This question is written, with the wording "to capacity" in the question and "capacity" in statement (2), to tempt us to believe that the information on the capacities of the tanks provided by statement (2) is necessary for answering the question and that therefore the correct answer is (C).
However, the truth is that the information on the amount of fuel they purchased provided by statement (1) is sufficient.
Correct Answer
Key takeaway:
The GMAT uses matching wording to create traps to determine whether we understand what's going on in the question or are just going by vibe when choosing an answer.
General Discussion
20 Dec 2023, 11:28
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