,_ . 7) Suppose adult Americans are to be chosen at random and their blood type recorded. Let X = the trial at which you first come across someone with type AB blood. Answer the following, assuming the probability that a randomly chosen American having type AB blood is .005. Each part below is worth 2 points. a) = the chances that the rst person chosen has type AB - blood. 1:) = the chances that the thirtieth person chosen is the first to have type AB - blood. c) = the probability that rst success is experienced before 201 subjects. d) = the probability that it will take more than 200 subjects before getting one with type AB ~~ blood. 9.} = the trial at which one would \"expect\" to come across the first person with type AB blood. '3 f) It would be unusual to screen more than subjects before coming across one with type AB - blood. I encourage you to show scratchwork below. ll #= U