Dr. Montgomery has a class of 10 Biology majors and 13 Psychology majors. He writes each student's name on a popsicle stick and puts all the sticks in a cup. Each class, he calls on students at random to answer questions. Each time he calls on a student, he puts their stick back into the cup. Today, he called on two students who were Psychology majors. What is the probability that the next student he calls will be a Psychology major? a) 11/23 b) 11:21 c) 13/21 d) 13/23