数学理
数学(理科)评分标准第1页共9页绵阳市高中2021级第三次诊断性考试理科数学参考答案及评分意见一、选择题:本大题共12小题,每小题5分,共60分.CBACBDDCBCDA二、填空题:本大题共4小题,每小题5分,共20分.13.1014.15.16.2三、解答题:本大题共6小题,共70分.17.解:(1)由列联表可计算,·······4分∴有95%的把握认为参数调试能够改变产品合格率.···························5分(2)根据题意,设备更新后的合格概率为0.8,淘汰品概率为0.2.········6分可以认为从生产线中抽出的6件产品是否合格是相互独立的,········...
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