Alternately, if the probability of liking the shows are completely uncorrelated, then with 20 shows you'll have 64% of the market watching at least one of your

Alternately, if the probability of liking the shows are completely uncorrelated, then with 20 shows you'll have 64% of the market watching at least one of your shows. (and of course there's the worst-case scenario where all 20 shows appeal to the same 5%!)