名校
1 . 下列叙述:①某人射击
次,“射中
环”与“射中
环”是互斥事件;
②甲、乙两人各射击
次,“至少有
人射中目标”与“没有人射中目标”是对立事件;
③抛掷一枚硬币,连续出现
次正面向上,则第
次出现反面向上的概率大于
;
④若样本数据
,
,
,
的方差为
,则数据
,
,
,
的方差为
.则所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
②甲、乙两人各射击
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
③抛掷一枚硬币,连续出现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
④若样本数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df223852f71d78270d8f719fac84770e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60191c0e64d94adc4f21ed712abc166c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2573e74a841b8481b1bd063ae87b8172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca62d22c6b79d3aca5c72c3c38a6dd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
A.①③ | B.①②④ | C.②④ | D.①② |
您最近一年使用:0次
2021-01-29更新
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214次组卷
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3卷引用:广东省广州市省实,执信,广雅,二中,六中五校2020-2021学年高二上学期期末联考数学试题