Median of the numbers 4, 4, 5, 7, 6, 7, 7, 3, 12 is

1. 4

2. 5

3. 6

4. 7

The median of the data

78, 56, 22, 34, 45, 54, 39, 68, 54, 84 is

1. 45

2. 49.5

3. 54

4. 56

Find the mean and the median of the following set of numbers :

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

Find the mean and the median of all the (positive) factors of 48.