TB Worldwide, tuberculosis is the number-one cause of death from an infectious disease. But the majority of cases are in developing countries. In the U.S., the probability of contracting TB is small, with p about 0.0005 for a new case in a given year. In a town of 8000 people:

1. What’s the expected number of new cases?

2. Use the Poisson model to approximate the probability that there will be at least one new case of TB next year.