To find the probability of randomly choosing a student whose favorite color is green, you would need to know the total number of students and the number of students whose favorite color is green.
Let's say there are 20 students in total and 5 students whose favorite color is green.
The probability of randomly choosing a student whose favorite color is green would be:
5 (favorable outcomes) / 20 (total outcomes) = 5/20 = 1/4
Therefore, the probability of randomly choosing a student whose favorite color is green is 1/4.