Mathematics, 03.08.2021 21:10 clipsyden

Suppose that 10% of all steel shafts produced by a 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. What is the (approximate) probability that X is: a. Less than 30?
b. Between 15 and 25 (inclusive)?

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Suppose that 10% of all steel shafts produced by a process are nonconforming but can be reworked (ra...

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