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Under usual conditions, a distillation unit in a renery can process a mean of 135,000 barrels per day of crude petroleum, with a standard deviation

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Under usual conditions, a distillation unit in a renery can process a mean of 135,000 barrels per day of crude petroleum, with a standard deviation of 6,000 barrels per day. You may assume the normal distribution. 1. Find the probability that the number of barrels processed on a given day will be between 125,000 and 140,000. 2. Suppose that yesterday the refinery was working much slower than usual and processed less oil that it normally does in 30% of all days. How many barrels of oil were processed yesterday? You may round it to the nearest barre! (up or down, doesn't matter)

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