Isaac is a physical therapist who specializes in leg injuries. His patients differ in age and type of injury.
The probability that a patient is 46-80 years old is 0.05, the probability that a patient suffers from shin pain is 0.23, and the probability that a patient is 46-80 years old and suffers from shin pain is 0.04.
What is the probability that a randomly chosen patient is 46-80 years old or suffers from shin pain?