Suppose that it is known that the number of items produced at a factory per week is
Question:
Suppose that it is known that the number of items produced at a factory per week is a random variable X with mean 50.
(a) What can we say about the probability X ≥ 75?
(b) Suppose that the variance of X is 25. What can we say about P (40 < X < 60)?
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