Each salesperson in a large department store chain is rated on their sales ability and their potential for advancement. The data for the 500 sampled salespeople are summarized in the following table. Potential for Advancement Fair Good Excellent Below Average 16 12 22Sales Ability Average 45 60 45 Above Average 93 72 135
A) Calculate the marginal probabilities
B) If one person is randomly selected, find the probability that the person sales ability is above average given that the person has an excellent.
C) If one person is randomly selected, find the probability that the person sales ability is average or above average.