Blood types: The blood type O negative 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 emergency and their blood type cannot be determined, they are given type O negative 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 5% of U.S. residents have type O negative blood. Assume that a blood bank has recruited 18 donors. Round the answers to at least four decimal places.

(b)What is the probability that fewer than five of them have type O negative blood?

The probability that fewer than five of them have type O negative blood is ____.

More questions to come.