a 17 1 :fi According to a consumer organization observing Myseas department store, every consumer returns 1 gift on average. We survey 6 individuals accounts with the store randomly chosen to gather evidence about the consumer organization's claim. We record how many gifts they returned last holiday season. If the consumer organization is correct, what would be the probability that each of the 6 individuals returned 1 gift? 0 0.002478 0 0.015625 0 0.5 0 0.7819 Fn 18 1 .' Let X be a discrete random variable. We were asked to calculate the following expression: 4795 10 10! 10 2:0 etc! + Zy=0 91(10y)!0'3y(0'7) y The expression is equal to 02 03 010 FAR 19 Suppose that random variable X follows a Poisson distribution with parameter 1=4. What is the expression Ex [2P (X = x)] + Ex [3xP (X = x)] + Ex [4x2 P(X =x) ] equal to? O 94 O 1124 O 16 O 334