Three students A, B, and C are enrolled in the same class. Suppose that A attends class 30

percent of the time (this is not a role model!!), B attends class 50 percent of the time, and

C attends class 80 percent of the time. Suppose these students attend class independently

of each other.

(a) What is the probability that at least one of them will be in class on a particular day?

(b) What is the probability that exactly one of them will be in class on a particular day?

(c) Suppose exactly one of them is in class on a particular day. Given this information,

compute the probability that that person is not B.