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设X、Y相互独立,X~N(4,1),Y~N(1,4),Z=2X-Y,则
分类: 数学1 (军队文职)
发布时间: 2023-11-03 09:28
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设X、Y相互独立,X~N(4,1),Y~N(1,4),Z=2X-Y,则
B.8
C.15
D.16
正确答案是B
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