题目内容

请写出样本空间：（1）袋中有5只求导，3只黑球2只白球，从袋中任意取一球，观察其颜色；（2）某运动员投篮时，连续5次都命中，观察其投篮次数。

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设x表示一个沿数轴做随机运动的质点位置，试说明下列各对事件间的关系（1）A ={|x-a|＜σ}，B ={x - a＜σ}；（2）A ={x＞20}，B ={x≤22}；（3）A ={x＞22}，B ={x＜19}

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