[单选题] 提问人:匿名网友 提问时间:2021-08-24

设某一批电灯泡的寿命(以小时计)近似服从N(160,202)分布,随机选取4个,那么其中没有一个寿命小于180小时的概率为( )。


A .(0.1587)4
B .(0.1687)4
C .(0.1787)4
D .(0.1487)4

提问人:匿名网友 提问时间:2021-08-24

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