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2020高考数学一轮复习课时作业64二项分布、正态分布及其应用理.doc

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1课时作业 64 二项分布、正态分布及其应用基础达标一、选择题12019合肥检测已知某公司生产的一种产品的质量 X(单位：克)服从正态分布N(100,4)现从该产品的生产线上随机抽取 10 000 件产品，其中质量在98,104内的产品估计有( )附：若 X 服从正态分布 N(， 2)，则 P( 得 p .316 1316 12 12故当每个新元件正常工作的概率超过 时，能够提高整个系统的工作性能126

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