In a class there are 13 seniors, 9 juniors, 8 sophomores and 5 freshmen. if one student is selected at random from this class, what is the probability that this student is: a) a junior? b) a freshman ?

Step-by-step explanation:

In a class there are 13 seniors, 9 juniors, 8 sophomores and 5 freshmen

Total number of students=

one student is selected at random from this class, selected student is Junior

there 9 juniors in the class

there 5 freshmen in the class