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Homework answers / question archive / The probability that a person in the United States has type B+ blood is 13%
The probability that a person in the United States has type B+ blood is 13%. Five unrelated people in the United States are selected at random.
A: Find the probability that all five have B+ blood.
B: Find the probability that none of the five have type B+ blood.
C: Find the probability that at least one of five has B+ blood.
Which of the events can be considered unusual?
a: the event in part A is unusual because its probability is less than or equal to 0.05
b: None are unusual
c: The event in part C is unusual
b: The event in part B is unusual
