The probability that a person in the United States has type B* blood is 8%. Five

Question

The probability that a person in the United States has type B* blood is 8%. Five unrelated people in the United States are selected at random. Complete parts (a) through (d). Find the probability that all five have type B* blood the probability that all five have type B* blood is Find the probability that none of the five have type B* blood the probability that none of the five have type B* blood is Find the probability that at least one of the five has type B* blood The probability that at least one of the five has type B* blood is Which of the events can be considered unusual? Explain. Select all that apply. None of these events are unusual. The event in part (b) is unusual because its probability is less than or equal to 0.05. The event in part (c) is unusual because its probability is less than or equal to 0.05.

Explanation / Answer

probability of having a B group blood = 0.08

probability of not having a blood group b = 0.92

a) probability that all 5 have B blood group = 0.08^5 = 0.000003

b) probabaility that 0 have b blood = 0.92^5 = 0.6580

c) probability that at least 1 have b blood group = 1 - p(no one has b blood group) = 1 - 0.6590 = 0.3410

d) in this only option D is correct because the event A is completely unsual as the probability id almost equal to 0 in the rest cases the probability is there which shows its existence, hence option D is correct.

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