To find the median of the given set of numbers (2, 2, -5, -7, -7), we first need to arrange the numbers in ascending order:
-7, -7, -5, 2, 2
Since there are 5 numbers in this sorted list (an odd count), the median is the middle number. The middle number in this case is the third number in the sorted list:
-7, -7, -5, 2, 2
Thus, the median is -5.