Solution:

(a) Arranging the numbers in ascending order :

0, 1, 2, 2, 3, 4, 5, 5, 5, 7, 8, 9

Here, n = 12 which is even

Median = ½ ( n/2 ^th term + ((n/2)+1)^th term)

= ½ (12/2 ^th term + ((12/2)+1)^th term)

= ½ (6 ^th term + (6+1)^th term)

= ½ (6 ^th term + 7^th term)

= ½ (4+5)

= 9/2

= 4.5

Hence the median is 4.5.

(b) Arranging the numbers in ascending order :

3, 4, 9, 10, 12, 15, 17, 27, 47, 48, 75, 81

Here, n = 12 which is even

Median = ½ ( n/2 ^th term + ((n/2)+1)^th term)

= ½ (12/2 ^th term + ((12/2)+1)^th term)

= ½ (6 ^th term + (6+1)^th term)

= ½ (6 ^th term + 7^th term)

= ½ (15+17)

= ½ ×32

= 16

Hence the median is 16.