Chapter 5 (Q 6) Suppose that only 20 percent of UC students take summer classes and 80 percent never take summer classes (a) In a class with 15 students, find the probability of having 8 students who will take summer classes in summer 2020 (use table). ANS. (b) Find the mean, variance and standard deviation of the number of students who will take summer courses in this class with 15 students. ANS. mean: ANS. Variance: ANS. Standards deviation