At the beginning of the semester, a professor tells students that if they study for the tests, then there is a 55 percent chance they will get a B or higher on the tests. If they do not study, there is a 20 percent chance that they will get a B or higher on the tests. The professor knows from prior surveys that 60 percent of students study for the tests. What is the probability that a randomly selected student studies for a test and gets a B or higher?