Suppose that 12 of all steel shafts produced by a certain process are nonconforming but can be reworked rather than having to be scrapped Consider a random sample of 200 shafts and let X denote the number among these that are nonconforming and can be reworked Round your answers to four decimal places USE SALT a What is the approximate probability that X is at most 30 b What is the approximate probability that X is less than 30 c What is the approximate probability that X is between 15 and 25 inclusive