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QUESTION 4. The weight of the sugar boxes produced by A Sugar Factory has a normal...

QUESTION 4. The weight of the sugar boxes produced by A Sugar Factory has a normal distribution; its average is 900 grams and its standard deviation is 50 grams. What is the probability that the average weight of the sample of 25 units selected from sugar boxes will be between 870 grams and 890 grams?

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