[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f40DrYFXTw8KJw9cwBDzX4sD4SaLl6AhgFEP-1Ffss6U":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-03-15 21:10:21",134199031,[8,9,10,11],"2","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F497bf823a153ed49ae11fa0c19f6996f.png\">","0","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc1d5cc30f60fcdab4b91355ef9940b91.png\">",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},5,"eb47328ccda03f6d25ec1902f0824ad7","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4147cadc67fb4257eed026253aee7007.png","概率论与数理统计","145698417dc345af910723aa90b802b4","4.1课前测试","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F53089b92bf367a4145618ed84ecb0931.png\">则EY=( )",[21,32,41,50,53],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],134199028,[25,26,27,28],"18","9","30","32","X为随机变量,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F04f4218a6d4a47bf3ccb4e35875acd35.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7229d7823c4816449384a18da6a6a226.png\">=( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],134199029,[36,37,38,39],"1","-2","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F154cbb52818e2a519e4ece9c41171b4a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fccd129549b1d7a9724bb157766cbfbbd.png\">","已知X服从参数为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fac1846e7fbfefac31ada2ac8bcda0516.png\">的泊松分布,且\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa31452451b5bc7b81ccf38cbe845f689.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1918d65b5b15ac6ae048979607ad9c8a.png\">为( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],134199030,[45,46,47,48],"6元","12元","7.8元","9元","现有10张奖券,其中8张为2元,2张为5元,某人从中随机、无放回地抽取3张,则此人所得奖金的数学期望为( )",{"answer":51,"createTime":5,"id":6,"options":52,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],134199032,[57,58,59,60],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3eeda501a32eaa335a4a244d64d56989.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F286fa12b0b4572f5ace3f4e6b5be3422.png\">","21","20","随机变量\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F196d290d7dd457a1a883399c56a1acba.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faadc1cab9323fed4ae9bd071ee93d701.png\">=( )"]