The weights (in kg) of 15 students are: 31,35,27,29,32,43,37,41,34,28,36,44,45,42,30. Find the median. If the weight 44kg is replaced by 46 kg and 27kg by 25 kg, find the new median.

Explanation

The weights (in `kg`) of `15` students are:`{31,35,27,29,32,43,37,41,34,28,36,44,45,42,30}`
Arranging them in order:`{27,28,29,30,31,32,34,35,36,37,41,42,43,44,45}`
Median is the middle value.
`therefore35kg` is the median.
Now, if `44kg` is replaces by `46kg` and `27kg` is replaced by `25kg` then:
`{25,28,29,30,31,32,34,35,36,37,41,42,43,45,46}`
The new median will be `35kg`.