Homework 04: Problem 4 Previous Problem Problem List Next Problem (1 point) To examine the effectiveness of its four annual advertising promotions, a mail order company has sent a questionnaire to each of its customers, asking how many of the previous year's promotions prompted orders that would not have othenNise been made. The accompanying table lists the probabilities that were derived from the questionnaire, where X is the random variable representing the number of promotions that prompted orders. If we assume that overall customer behavior next year will be the same as last year, what is the expected number of promotions that each customer will take advantage of next year by ordering goods that othenNise would not be purchased? X 0 1 2 3 4 P()() 0.063 0.214 0.354 0.182 0.187 Expected value = Homework 04: Problem 5 Previous Problem Problem List Next Problem (1 point) 1 The values that discrete random variable, x, may take is {3, 4, 6, 8, 12, 24}. The probablity mass function for the probablity distribution of x is f(x) = . x A) E(x) = B) P(x 3)