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616 + 634 + 721 + 510 + 634 + 711 + 615 + 631 + 634 + 720 =6426
Mean = 6426/10
=642.6
Mode = 634
Median
510, 615, 616, 631, 634, 634, 634, 711, 720, 721
Median = ( 634+634)/2
=634
joseph rimiru answered the question on October 16, 2017 at 18:55
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