Answer with Step-by-step explanation:
Median of the set of a data is the middle value of the data sets arranged in ascending order.
Here, we are given a data set:
86 87 87 94 95 82 78 89 80 84
Firstly we arrange the data set in ascending order:
78 80 82 84 86 87 87 89 94 95
The middle value of the above data lies between fifth and sixth value
i.e. between 86 and 87
Median=

= 86.5
Hence, the median score for these students are:
86.5