Coursepack, p. 578 MAT 133: 6.2 WS 2 p.3 The blood type O negative (O-) is called the "universal donor" type because it is the only blood type that may safely be transfused into any person. Therefore, when someone needs a transfusion in an MAT emergency and their blood type cannot be determined, they are given type O- blood. For this reason, donors with this blood type are crucial to blood banks. Unfortunately, this blood type is fairly rare according to the Red Cross, only 7% of U.S. residents have type O - blood. Assume that a blood bank has ion med recruited 20 unrelated donors. (State calculator entry and give 4 decimal places) zed 6-17 a) State n: and p: b) Find the probability that fewer than three of them will have type O- blood c) Find the probability that more than 4 of them have type O- blood? d) Find the probability that between 2 and 6 of them, inclusive, have type O- blood way in the past she mon e) Find the probability that none of the donors had type O- blood. Would this be unusual? Explain. of this binomial experiment and standard deviation f) Find the mean g) Interpret the mean and standard deviation in the context of the situation. Be specific