OFFICIAL EXPLANATION
Hi All,
We're asked if Meadow Park have a greater number of amphibians than reptiles within the park’s borders? This is a YES/NO question and can be solved with ratios or by TESTing VALUES.
1) The ratio of the number of amphibians to all other animals in the park is 1:16
The information in Fact 1 tells us that there is some MULTIPLE of 17 animals in the park - and for every 1 amphibian, there are 16 other animals in the park. However, we do NOT know the total number of animals in the park and we do not know how many of those animals are reptiles.
Fact 1 is INSUFFICIENT
2) The ratio of the number of reptiles to all other animals in the park is 2:31
The information in Fact 2 is similar to the information in Fact 1: Fact 2 tells us that there is some MULTIPLE of 33 animals in the park - and for every 2 reptiles, there are 31 other animals in the park. However, we do NOT know the total number of animals in the park and we do not know how many of those animals are amphibians.
Fact 2 is INSUFFICIENT
Combined, we know...
The ratio of the number of amphibians to all other animals in the park is 1:16
The ratio of the number of reptiles to all other animals in the park is 2:31
From our prior work, we know that 1 out of every 17 animals is an amphibian and 2 out of every 33 animals are reptiles. We can compare those two fractions to one another...
1/17 vs. 2/33
Since 1/17 = 2/34... we know that 2/33 is a LARGER fraction (since it has a smaller denominator by comparison). Thus, the number of reptiles would be LARGER than the number of amphibians - and the answer to the question is ALWAYS NO.
Combined, SUFFICIENT
Final Answer:
GMAT assassins aren't born, they're made,
Rich
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