Discussion:
Q: Suppose that a certain college class contains 59 students. Of these, 35 are seniors, 30 are business majors, and 12 are neither. A student is selected at random from the class.
a. What is the probability that the student is both a senior and a business major?
b. Suppose that we are given the additional information that the student selected is a senior. What is the probability that she is also a business major?