Russell's movie collection contains 4 movies, including 2 romance movies.
What is the probability that a randomly selected movie will be a romance movie?
To find the probability, we need to divide the number of romance movies out of the total number of movies in Russell's collection.
Number of romance movies = 2
Total number of movies = 4
Therefore, the probability of randomly selecting a romance movie is 2/4 = 1/2 = 0.5.
So, the probability is 0.5 or 50%.