Percentiles Problem

GRE Quant Problem Solving
1

Hi, everyone!

Quick question in this problem from Quant Foundation:

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According to the image above, the answer is 60, and I get why. However, I got a little confused with the explanation of the 0-99th percentile groups. Using that definition, the 60th to 89th percentile groups would fall within the range of 61-80 scores. Do you see what I mean? Or am I missing something? In that case, the answer cannot be 60.

2

But this definition doesn’t apply here. If I understand you correctly, a “60th-percentile group” would include all students whose percentile ranks fall between 60.0 and 60.9; however, the question is asking specifically about the 60th percentile, not the entire “group”.