来自宋宗贤的问题
【概率·····························10件产品中有2个次品,从中任取2个,则至少取到1个次品的概率是_____】
概率·····························
10件产品中有2个次品,从中任取2个,则至少取到1个次品的概率是_____
1回答
2020-03-02 20:33
【概率·····························10件产品中有2个次品,从中任取2个,则至少取到1个次品的概率是_____】
概率·····························
10件产品中有2个次品,从中任取2个,则至少取到1个次品的概率是_____
至少取到1个次品的反面是没有取到次品即全不是正品:8C2与至少取到1个次品互异为1-((8C2)/(10C2))=17/45