• 2022-11-04
    已知离散型随机变量X的分布律为[img=171x22]17e0c268ecc7623.jpg[/img],则[img=8x14]17e0a69b88c16ec.jpg[/img]=( )
    未知类型:{'options': ['', ' [img=38x37]17e0c26905694a5.jpg[/img]', ' [img=48x37]17e0c26911d0977.jpg[/img]', ' [img=49x37]17e0c2691ec48cf.jpg[/img]'], 'type': 102}