Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then determine if the events are unusual. If convenient, use the appropriate probability table or technology to find the probabilities.

The mean number of heart transplants performed per day in a country is about

seven

.

Find the probability that the number of heart transplants performed on any given day is (a) exactly

five

,

(b) at least

eight

,

and (c) no more than

four

.

(a)

P(5

)equals0.128(Round to three decimal places as needed.)

(b) P(at least

8

)equals. 401

(Round to three decimal places as needed.)

(c) P(no more than

4

)equals. 173

(Round to three decimal places as needed.)

Which of the events are unusual? Select all that apply.

A.

The event in part (a) is unusual.

B.

The event in part (b) is unusual.

Your answer is not correct.

C.

The event in part (c) is unusual.

D.

None of the events are unusual.