41, 13, 13, 27, 28, 31, 27, 17, 34, 28, 27

should be rearranged in ascending order to evaluate median

13, 13, 17, 27, 27, 27, 28, 28, 31, 34, 41.

therefore:

Mean: 26 = Sum of [13, 13, 17, 27, 27, 27, 28, 28, 31, 34, 41]/11 = 286/11

Median: 27 = 6th term in the sequence

Mode: 27 = 27 is repeated the most ( 3 Times ).