Jasmine International has 100 prospective original bracelets. About 20% of all bracelets come to order for retailing. Suppose that the binomial assumptions are fulfilled and use a normal approximation to answer.
What is the probability that more than 18 come to order for retailing?
What is the probability that exactly 15 come to order for retailing?
What is the probability that 13 or less come to order for retailing?