In a Probability class, 45% of the students pass the class, 20% of the students fail the class, and 35% of the students drop the class. Of those passing the class, 80% enjoy the class.
1. What is the probability that a student pass the class and enjoy it?
2. What is the probability that a student enjoy the class?
3. If a student enjoythe class, what is the probability that the student drops the class?