coa514 coa514 01-03-2017 Mathematics contestada Which of these data sets is symmetrical? A. 1, 6, 11, 11, 16, 16, 16, 21, 21, 26, 31 B. 1, 1, 11, 11, 16, 16, 16, 21, 21, 26, 31 C. 1, 6, 11, 16, 16, 16, 21, 21, 21, 26, 31 D. 1, 6, 11, 11, 11, 16, 16, 16, 21, 26, 31