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 7% of U.S. residents have type O negative blood. Assume that a blood bank has recruited 18 donors. Round the answers to four decimal places. Part 1 of 3 (a) What is the probability that two or more of them have type O negative blood? The probability that two or more of them have type O negative blood is D. Part 2 of 3 (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 D. Part 3 of 3 (c) Would it be unusual if none of the donors had type O negative blood? It (Choose one) v be unusual if none of the donors had type O negative blood since the probability is0.

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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 7% of U.S.
residents have type O negative blood. Assume that a blood bank has recruited
18 donors. Round the answers to four decimal places.
Part 1 of 3
(a) What is the probability that two or more of them have type O negative
blood?
The probability that two or more of them have type O
negative blood is D.
Part 2 of 3
(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 O.
Part 3 of 3
(c) Would it be unusual if none of the donors had type O negative blood?
It (Choose one) ▼ be unusual if none of the donors had
type O negative blood since the probability is D.
Transcribed Image Text: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 7% of U.S. residents have type O negative blood. Assume that a blood bank has recruited 18 donors. Round the answers to four decimal places. Part 1 of 3 (a) What is the probability that two or more of them have type O negative blood? The probability that two or more of them have type O negative blood is D. Part 2 of 3 (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 O. Part 3 of 3 (c) Would it be unusual if none of the donors had type O negative blood? It (Choose one) ▼ be unusual if none of the donors had type O negative blood since the probability is D.
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