Probability using Normal approximation to Binomial.
USA Today reported that 11% of all books sold are of romance genre. If a local bookstore sells 316 books on a given day, what is the probability that
(a) Fewer than 40 are romances?
(b) as a minimum 25 are romances?
(c) Between 25 and 40 romances
(d) In the solution to this problem, what is n? p? q? Does it appear that both np and nq are larger than 5? Why is this important consideration?