【判断题】【消耗次数:1】
A∪B∪C”表示三事件A、B、C至少有一个发生。
正确
错误
参考答案:
复制
纠错
相关题目
【判断题】 事件“ABC”表示三事件 A、B、C 至少有一个发生
①  正确
②  错误
【判断题】 “ABC”表示三事件A、B、C至少有一个发生
①  正确
②  错误
【判断题】 事件A和B的并是指:A与B中至少有一个发生
①  正确
②  错误
【单选题】 P(A)=P(B)=P(C)=1/8,P(AB)=1/4,P(BC)=P(AC)=0,则事件A,B,C至少有一个发生的概率是( )
①  1/2
②  1/4
③  1/6
④  1/8
【单选题】 C至少有1个发生的概率为()
①  <imgwidth="15"height="41"v:shapes="_x0000_i1054"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image060.png">
②  <imgwidth="15"height="41"v:shapes="_x0000_i1055"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image062.png">
③  <imgwidth="16"height="41"v:shapes="_x0000_i1056"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image064.png">
④  <imgwidth="15"height="41"v:shapes="_x0000_i1057"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image066.png">
【单选题】 设A,B,C为三个事件,则ABC表示
①  A,B,C都发生
②  A,B,C都不发生
③  A,B,C至少有一个发生
④  A,B,C不多于一个发生
【单选题】 设矩阵A的秩为r,下列说法正确的是( )(A) 矩阵A的所有r阶子式都为零;   (B) 矩阵A的所有r+1阶子式都为零;(C) 矩阵A至少有一个r阶子式为零;(D)矩阵A至少有一个r+1阶子式不为零。
①  (A)
②  (B)
③  (C)
④  (D)
【判断题】 设A,B,C为三个事件,若P(ABC)=P(A)P(B)P(C),则事件A,B,C相互独立
①  正确
②  错误
【多选题】 事件A,B发生,而C不发生,用事件的运算可表示为
①  <img class=jc-formula data-tex=AB\bar { C } src=https://huaweicloudobs.ahjxjy.cn/7AFCB5E4F0D721D287516BB53D312637.png style=vertical-align: middle;/>
②  <img class=jc-formula data-tex=(A\bigcup B)\bar { C } src=https://huaweicloudobs.ahjxjy.cn/13DA37708FBF3E2BA2832AD6DE6BCF87.png style=vertical-align: middle;/>
③  <img class=jc-formula data-tex=AB-C src=https://huaweicloudobs.ahjxjy.cn/6BC84DEF4F6FB9F0C1F005EF18A081F7.png style=vertical-align: middle;/>
④  <img class=jc-formula data-tex=AB\subset C src=https://huaweicloudobs.ahjxjy.cn/461F7D6E053A622C706FD0D49C850E0C.png style=vertical-align: middle;/>
【判断题】 设 A、B、C 为 三事件,若满足:三事件两两独立,则三事件 A、B、C相互独立
①  正确
②  错误
随机题目
【单选题】 His decision was ____, since he could not see the action from where he was standing.
①  arbitrary
②  ordinary
③  casual
④  accurate
【单选题】 Operations which left patients ____ and in need of long periods of recovery time now leave them feeling relaxed and comfortable.
①  exhausted
②  unhealthy
③  upset
④  fearful
【单选题】 Mother told Rose to buy some sugar in the supermarket and_____.
①  she did so
②  so she did
③  so did she
④  she did such
【单选题】 The bank is reported in the local newspaper ____ in broad daylight yesterday.
①  to be robbed
②  robbed
③  to have been robbed
④  having been robbed
【单选题】 The thieves ____ the waste paper all over the room while they were searching for the diamond ring.
①  spread
②  scratched
③  scattered
④  burned
【单选题】 You must pay import ____ on certain goods brought into this country.
①  money
②  fees
③  bills
④  duties
【单选题】 Her mother’ s words of love and help____ the sobbing child.
①  comforted
②  encouraged
③  excited
④  eased
【单选题】 It is a(n) ____ attitude to take towards life.
①  absurd
②  silly
③  stupid
④  authentic
【单选题】 Postal ____ are determined by the class and weight of the parcel mailed.
①  taxes
②  payment
③  fees
④  premium
【单选题】 The bus was____ the driver.
①  in charge of
②  in the charge of
③  take charge of
④  free of charge