Median of the given data is : -1, 12, 19, -5, -5, -7, 18, 11, -8, 21.

-7 -8 5 -5

5

Arrange in as Ascending order = -8, -7, -5, -5, -1, 11, 12, 18, 19, 21 N = 10 which is even Hence, median = \(\frac{(\frac{n}{2})th\;term\;+\;(\frac{n}{2} +1)th\;term}{2}\)                        = \(\frac{5th\;term\;+\;6th\;term}{2}\)                        = \(\frac{-1\;+\;11}{2}\)  = 5