Calculate the mean of X

There are 104 students in Professor Negroponte's statistics class, 49 math majors and 55 statistics majors. Sixty of the students live in the dorms and the rest live off campus. Twenty of the math majors live off-campus. At the beginning of each day that Professor Negroponte's class meets, he randomly selects a member of the class to present the OBFW Publishers solution to a homework problem. Suppose the class meets 40 times during the semester and the selections are made with replacement. Let X = the number of times a statistics major is selected to present a solution. (a) Is X a binomial random variable? Justify your