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Items produced by a certain process are supposed to weigh 90 grams. However, the process is such that there is variability in the items produced and they do not all weigh exactly 90 grams. The distribution of weights is normal with a mean of 89.8 grams and a standard deviation of 1.1 gram.
-If we have a random sample of 10 of these items, what is the probability that their average weight exceeds 91 grams?
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