The probability that a person in the United States has type

B+

blood is

8

%.

Three

unrelated people in the United States are selected at random. Complete parts (a) through (d).

(a) Find the probability that all

three

have type

B+

blood.

The probability that all

three

have type

B+

blood is

nothing

.

(Round to six decimal places as needed.)

(b) Find the probability that none of the

three

have type

B+

blood.

The probability that none of the

three

have type

B+

blood is

nothing

.

(Round to three decimal places as needed.)

(c) Find the probability that at least one of the

three

has type

B+

blood.

The probability that at least one of the

three

has type

B+

blood is

nothing

.

(Round to three decimal places as needed.)

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

A.

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

B.

The event in part left parenthesis a right parenthesis is unusual because its probability is less than or equal to 0.05

.

C.

None of these events are unusual

.

D.

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