We look at the American people over 50 years old like this:

- 80% will be fully vaccinated against Covid before the end of May.

- 20% have a dog.

- 16% will be fully vaccinated against Covid19 before the end of May and own a dog.

An American person over 50 years old is drawn at random. We define two events:

A: The person will be fully vaccinated against Covid19 before the end of May.

B: The person owns a dog.

a) Calculate ( )

b) Calculate ( ) and give an interpretation of your result.

c) Calculate (|) and give an interpretation of your result.

d) Are A and B independent events? Explain your answer.