Question

The probability that a person in the United States has type B​+ blood is 12%.

5 unrelated people in the United States are selected at random.

Complete parts​ (a) through​ (d).

​(a) Find the probability that all four have type B​+ blood.The probability that all four have type B​+ blood is?

​(Round to six decimal places as​ needed.)

​(b) Find the probability that none of the four have type B​+ blood.The probability that none of the four have type B​+ blood is?

​(Round to three decimal places as​ needed.)

​(c) Find the probability that at least one of the four has type B​+ blood.The probability that at least one of the four has type B​+ blood is?

​(Round to three decimal places as​ needed.)

​(d) Which of the events can be considered​ unusual? Explain. Select all that apply.

A.None of these events are unusualNone of these events are unusual.

B.The event in part​ (a) is unusual because its probability is less than or equal to 0.05.

C.The event in part​ (b) is unusual because its probability is less than or equal to 0.05.

D.The event in part​ (c) is unusual because its probability is less than or equal to 0.05.

Answer 1

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