判断题

设随机事件A与B互不相容,P(A)= 0.2,P(A∪B)= 0.5,则P(B)=0.3。()

【参考答案】

正确

(↓↓↓ 点击‘点击查看答案’看答案解析 ↓↓↓)
<上一题 目录 下一题>
热门 试题

单项选择题
听力原文:M: Do you think James can get a scholarship to Oxford?W: He doesn't stand a chancE.Q: What does the woman mean?(17)A.There is no way for James to win a scholarship.B.If James is lucky, he might get a scholarship.C.James bas to wait for a good chance to get a scholarship.D.James doesn't want to go to OxforD.
A.Q:
B.There
C.
B.If
D.
C.James
E.
D.James
F.
单项选择题
听力原文:W: Maybe we should take Main Street this morning. The radio announcer said traffic on the 7th Avenue is really heavy.M: Well, if he says to take Main Street, we should go the other way!Q: What do we learn about the man?(18)A.He always does what the announcer says.B.He thinks that the announcer is very good at his work.C.He is angry at the announcer's words.D.He doesn't believe what the announcer says.
A.M:
B.He
C.
B.He
D.
C.He
E.
D.He
F.
相关试题
  • A、体外循环麻醉止血抗生素引流B、麻醉止血...
  • 有一房地,其建筑总面积为8000m2,某...
  • What are the listeners suggested to...
  • 听力原文:M: Do you want your tele...
  • 我国第二代移动通信系统CDMA的工作频段是(...