The correct option is C 48
Following the key, the above stem and leaf diagram can be read as:
20, 35, 40, 45, 48, 50, 53, 62, 64
The median is the middle value of a numerically ordered data set.
Since the total number of data points is 9, the median is the middle value of the data set arranged in ascending order. In this case, it is the 5th value.
Thus, the median of the given data set is 48.