Question: 18
(Choose 1 answer)
According to the record of the registrar's office at a state university, 35% of the students are freshman, 25%
are sophomore, 16% are junior and the rest are senior. Among the freshmen, sophomores, juniors and
seniors, the portion of students who live in the dormitory are, respectively, 80%, 60%, 30% and 20%. If a
randomly selected student lives in the dormitory, what is the probability that the student is a freshman?
A. 0.447
B. 0.475
C. 0.525
D. 0.532
