Question

Suppose that a certain college class contains 40 students. Of these, 26 are sophomores, 21 are history majors, and 5 are neither. A student is selected at random from the class. (a) What is the probability that the student is both a sophomore and a history major? (b) Given that the student selected is a history major, what is the probability that she is also a sophomore? Write your responses as fractions. (If necessary, consult a list of formulas.) DO (b) х ?

Answer 1

موهن nis) = 404 niso = 26, niH) = 21 nl neitha 1-5. el sophomore and history) 80 nisophomene on his tery) = 4o 5=35 now nisophomre and his try) = .2 6+21-35 12 pl sophomme and hestery) = 12 0.3 디이 2 pl Sokhomveel histeryl 12 2) CS Scanned with CamScanner