An oncologist performs a high-risk treatment on a very aggressive type of cancer for 30 different patients. The procedure has a success rate of only 39%.

1. What is the probability that exactly half of the 30 treatments are successful?
2. What is the probability that at least 5 of the treatments performed are successful?
3. How many of the treatments should the oncologist expect to be successful?
4. Using the Range Rule of Thumb, what is the approximate range of the number of treatments that the oncologist would expect to be successful?
5. a. P (Half Succesful) =

Round to 4 significant digits.

b. P (At Least 5 Succesful) =

Round to 4 significant digits.

c. # Successful Expected =

Round to nearest patient.

d. Range Successful Expected =