Probability using the complement rule

[trastic]

"It is reported that 16 percent of American households use a cell phone exclusively for their tele- phone service. In a sample of eight households, find the probability that:
a. None use a cell phone as their exclusive service.
b. At least one uses the cell exclusively.
c. At least five use the cell phone.

 

[Prove It]

"It is reported that 16 percent of American households use a cell phone exclusively for their tele- phone service. In a sample of eight households, find the probability that:
a. None use a cell phone as their exclusive service.
b. At least one uses the cell exclusively.
c. At least five use the cell phone.

This is a binomial distribution with n = 8 and p = 0.16.