名校
解题方法
1 . 某市小型机动车驾照“科二”考试中共有5项考查项目,分别记作①,②,③,④,⑤.
![](https://img.xkw.com/dksih/QBM/2021/4/10/2697053599580160/2709700514758656/STEM/0eb44f02c9f94e6d994582e323d3a4f8.png?resizew=185)
(1)某教练将所带10名学员“科二”模拟考试成绩进行统计(如表所示),并打算从恰有2项成绩不合格的学员中任意抽出2人进行补测(只测不合格的项目),求补测项目种类不超过3项的概率;
(2)如图,某次模拟演练中,教练要求学员甲倒车并转向
,在汽车边缘不压射线
与射线
的前提下,将汽车驶入指定的停车位.根据经验,学员甲转向
后可使车尾边缘完全落在线段
,且位于
内各处的机会相等.若
,
,汽车宽度为
,求学员甲能按教练要求完成任务的概率.
![](https://img.xkw.com/dksih/QBM/2021/4/10/2697053599580160/2709700514758656/STEM/0eb44f02c9f94e6d994582e323d3a4f8.png?resizew=185)
(1)某教练将所带10名学员“科二”模拟考试成绩进行统计(如表所示),并打算从恰有2项成绩不合格的学员中任意抽出2人进行补测(只测不合格的项目),求补测项目种类不超过3项的概率;
项目 学员编号 | ① | ② | ③ | ④ | ⑤ |
(1) | ![]() | ![]() | ![]() | ||
(2) | ![]() | ![]() | ![]() | ||
(3) | ![]() | ![]() | ![]() | ![]() | |
(4) | ![]() | ![]() | ![]() | ||
(5) | ![]() | ![]() | ![]() | ![]() | |
(6) | ![]() | ![]() | ![]() | ||
(7) | ![]() | ![]() | ![]() | ![]() | |
(8) | ![]() | ![]() | ![]() | ![]() | ![]() |
(9) | ![]() | ![]() | ![]() | ||
(10) | ![]() | ![]() | ![]() | ![]() | ![]() |
注:“![]() |
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