Psychology and Human Behavior
Do you believe in ghosts? According to a recent survey, 21% of people in Sweden believe in ghosts.49 Suppose that of those who believe in ghosts, 20% said they have had a spiritual encounter with a ghost. Suppose a Swede is selected at random.
a. If the person believes in ghosts, what is the probability that she has never had an encounter with a ghost?
b. What is the probability that the person believes in ghosts and has had an encounter with a ghost?
c. What is the probability that the person believes in ghosts and has not had an encounter with one?