Suppose that 25% of all steel shafts produced by a certain process are nonconforming but can be reworked (rather than having to be scrapped). (a) In a random sample of 240 shafts, find the approximate...

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Extracted text: Suppose that 25% of all steel shafts produced by a certain process are nonconforming but can be reworked (rather than having to be scrapped). (a) In a random sample of 240 shafts, find the approximate probability that between 50 and 66 (inclusive) are nonconforming and can be reworked. (b) In a random sample of 240 shafts, find the approximate probability that at least 62 are nonconforming and can be reworked.