Blood Types The Blood Type O Negative Is Called The Universal Donor Type Because It Is The Only Blood Type That May S 1 (16.19 KiB) Viewed 28 times
Blood Types The Blood Type O Negative Is Called The Universal Donor Type Because It Is The Only Blood Type That May S 2 (13.32 KiB) Viewed 28 times
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.f. residents have type o negative blood. Assume that a blood bank has recruited 20 donors. Round your answers to four decimal places.
(a) What is the probability that two or more of them have type o negative blood? (b) What is the probability that fewer than four of them have type o negative blood? (c) Using a cutoff of 0.05, would it be unusual if none of the donors had type o negative blood? O
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