Just to get a feel on what level this is, what is your definition of a random variable?
Hello! on my book there is this exercise, but I don't understand what it is asking and clearly I don't know how to solve it.
It says: Give an example of a probability space and a real-valued function on Ω= {0,1,2} that is not a random variable.
Can you please help me understand it? Thank you so much!