Let X be the number of visits to the dentist's office for a randomly selected student. Suppose that X has a probability distribution function given by the following table: X 0 1 2 P(X= x) 0.15 0.50 0.35 Find P(X Su) where u = E(X) is the average number of visits. O 1 O 0.5 O 0.15 O 0.65