未知题型

某种疾病能导致心肌受损害,若第一次患该病,则心肌受损害的概率为0.3,第一次患病心肌未受损害而第二次再患该病时,心肌受损害的概率为0.6,试求某人患病两次心肌未受损害的概率

【参考答案】

0．28

相关考题

查看my_db数据库中,student表

未知题型查看my_db数据库中,student表

_____ good informtion! I hve never herd _____ wonderful...

单项选择题_____ good informtion! I hve never herd _____ wonderful news.Wht, suchB．Wht, suchC．How, s_____ good informtion! I hve never herd _____ wonderful news.Wht, such B．Wht, such C．How, so D．How, so

A.What a,such a
B.What, such
C.How, so
D.How, so a

“Hve you ever eten snils ” “No,nd I hope I ________.”wi...

单项选择题“Hve you ever eten snils ” “No,nd I hope I ________.”will neverB．never willC．hve neverD．neve“Hve you ever eten snils ” “No,nd I hope I ________.”will never B．never will C．hve never D．never hve

A．will neverB．never willC．have neverD．never have