Most binomial probability calculations required in these exercises can be done by using Table C or the Normal approximation. Your instructor may request that you use the binomial probability formula or software. In exercises requiring the Normal approximation, you should use the continuity correction if you studied that topic.
5.27 More on paying for music downloads.
Consider the settings of Exercises 5.24 and 5.26.
5.27
(a) . (b) 0.2131.