coa514
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