If each observation in a data is decreased by two, their :

1. mean decreases by 2, but median remains same.

2. mean remains same, but median decreases, by 2.

3. mean and median both decrease by 2.

4. mean and median both remain the same.

Find the median of :

25, 16, 26, 16, 32, 31, 19, 28 and 35

Find the median of :

63, 17, 50, 9, 25, 43, 21, 50, 14 and 34

Find the median of :

233, 173, 189, 208, 194, 204, 194, 185, 200 and 220