According to the record of the registrar's office at a state university, 40% of the students are freshmen, 25% are sophomores, 25% are juniors, and the rest are seniors. Among the freshmen, sophomores, juniors, and seniors, the portion of students who live in the dormitory are, respectively, 85%, 55%, 40%, and 15%.

If a randomly selected student does not live in the dormitory, what is the probability that the student is a freshman?