Answer
511
Work Step by Step
Since there is an even number, there is no single median, but a two middle numbers (these numbers are given). To find the median you take the average of these numbers
$(513+509)/2=511$
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 10 - Statistics - 10.4 Mean, Median, and Mode - 10.4 Exercises - Page 740: 22
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