离散型随机变量问题已知7件产品中有2件次品,现逐一不放回地进行检验,直到2件次品都能被确认为止.(I)求检验次数为4的概率;(II)设检验次数为ξ,求ξ的分布列和数学期望. 为什么求P
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 05:44:40
![离散型随机变量问题已知7件产品中有2件次品,现逐一不放回地进行检验,直到2件次品都能被确认为止.(I)求检验次数为4的概率;(II)设检验次数为ξ,求ξ的分布列和数学期望. 为什么求P](/uploads/image/z/1488423-39-3.jpg?t=%E7%A6%BB%E6%95%A3%E5%9E%8B%E9%9A%8F%E6%9C%BA%E5%8F%98%E9%87%8F%E9%97%AE%E9%A2%98%E5%B7%B2%E7%9F%A57%E4%BB%B6%E4%BA%A7%E5%93%81%E4%B8%AD%E6%9C%892%E4%BB%B6%E6%AC%A1%E5%93%81%2C%E7%8E%B0%E9%80%90%E4%B8%80%E4%B8%8D%E6%94%BE%E5%9B%9E%E5%9C%B0%E8%BF%9B%E8%A1%8C%E6%A3%80%E9%AA%8C%2C%E7%9B%B4%E5%88%B02%E4%BB%B6%E6%AC%A1%E5%93%81%E9%83%BD%E8%83%BD%E8%A2%AB%E7%A1%AE%E8%AE%A4%E4%B8%BA%E6%AD%A2%EF%BC%8E%EF%BC%88I%EF%BC%89%E6%B1%82%E6%A3%80%E9%AA%8C%E6%AC%A1%E6%95%B0%E4%B8%BA4%E7%9A%84%E6%A6%82%E7%8E%87%EF%BC%9B%EF%BC%88II%EF%BC%89%E8%AE%BE%E6%A3%80%E9%AA%8C%E6%AC%A1%E6%95%B0%E4%B8%BA%CE%BE%2C%E6%B1%82%CE%BE%E7%9A%84%E5%88%86%E5%B8%83%E5%88%97%E5%92%8C%E6%95%B0%E5%AD%A6%E6%9C%9F%E6%9C%9B%EF%BC%8E+%E4%B8%BA%E4%BB%80%E4%B9%88%E6%B1%82P)
xSNPDE$+8Nژ
;U@J*uBB-C T
!D|{_}1
TJ֓.sFj^ɑbT^*ٛy#9ϣ8"Ŕlr6cΔ,2Ȓ.bٺ,X2Y8m=~a(YmdTu}溞|~]O1'dn2Av̙z(*5~]5j ''1KShHg j TI/c]P(vO[Hdcc0:ߦQq=&GFFbY"C#CqDwnmh>!
GGj<Ƹ[0@tn]QT,@4 |B9YS~U"M5;W:s}=.NW_gjT۴!G[ag'0V"c"#: ˺\?=ry-ߧdjųZI%Pm20<"lox\WJPY芔.9'9 PhFۨ: S̓ibJ+4̽,CgO)