Addition and Multiplication Rule

1. Sarah is deciding which courses she wants to take in her next college semester.  The probability that she will enroll in an Algebra course GIVEN that she enrolls in a Biology course is 0.40.

	(a) What is the probability that she will enroll in both an Algebra course AND a Biology course?
	(b) What is the probability that she will enroll an Algebra course OR a Biology course?
	(c) Are the two events independent?
	(d) Are the two events mutually exclusive?