Query about Question 15 from "PrepSwift Quant Tickbox Quiz #13 (Data Analysis Column 1)" [6720]

GRE GRE Quant Problem Solving
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https://prepswift.gregmat.com/quizzes/quiz/prepswift-quant-tickbox-quiz-13-data-analysis-column-1 (Question 15

I did not understand why number of people in 11th and 45th percentile are equal? how can we say that

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See Percentiles - PrepSwift