(a) What is the probability that the student is both a sophomore and a chemistry major?

(b) Given that the student selected is a chemistry major, what is the probability that he is also a sophomore?

Question:

# Suppose that a certain college class contains 45 students. Of these, 26 are...

(a) What is the probability that the student is both a sophomore and a chemistry major?

(b) Given that the student selected is a chemistry major, what is the probability that he is also a sophomore?