* A real estate agent serves a mean of two families a day. Using the Poisson

distribution, find the following probabilities.

1. Find the probability that the agent serves at least one

family on a randomly selected day.

2. Find the probability that the agent serves exactly three families during the next two

days.

* Suppose that 8% of a population of parts is disappeared.

1. What is the probability that more than 12 % of 120 randomly selected parts are

disappeared?

2. What is the probability of randomly selecting 100 parts and finding that 4 or fewer

parts are disappeared?