The probability that a person in the United States has type B+ blood is 13%.
Four 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.

Step-by-step explanation:

Given that the probability that a person in the United States has type B+ blood is 13%.

Since four unrelated people in the United States are selected at random, we can say that each person is independent of the other to have B+ blood group.

Let X be the number of persons who have blood group B+ in the group of 4 persons.

X is Binomial with p = 0.13

a) P(X = 4) =

b) P(x =0) =

c)

d) All having B+ is unusual since probability is very negligible

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98