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Search results for: '某工厂内有甲乙两个车间，甲车间有14人，乙车间有26人，现将甲车间中最年轻的2人调入乙车间，则乙车间的平均年龄增加1岁，甲车间的平均年龄增加1岁，问在人员调动之前，两个车间的平均年龄差是（ ）岁。'

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