An artist entered two paintings (Lighthouse and Old Cathedral) in a show. He feels that the probabilities are 0.15, 0.18, and 0.11, respectively, that he will sell the Lighthouse, the Old Cathedral, or both. What is the probability that he will sell either of the two paintings?
A: the event that he will sell the Lighthouse
B: the event that he will sell the Old Cathedral
This solution provides step-by-step calculations for finding the probability of selling paintings.