离散型随机变量的数学期望和方差同步训练

在平时的测量工作中，他积极做好传、帮、带工作，热心地把自己学到和掌握好的操作技艺毫无保留地传授给徒弟andactualcasewhethermatch;byislocatedlandrightnature;propertystatus,whetherhasdamageorqualityproblem;propertyusingsituation,rentaloruse;referencearoundsimilarpropertyprice,judgeassessmentvalueofrationality;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,anddemolition,andtransformation,limitsituation.2.tolandrightmortgageof,surveypeopleshouldverifiedfollowinginformation:landrightcardbycontainsMinginformation(rightpeople,andlocation,andnature,andterm,andarea,)andactualcasewhethermatch;landnature;landflatsituation;groundbuildingssituation;referencearoundsimilarlandprice,judgeassessmentvalueofrationality;mortgagerealwhetherhasothermortgagerightornoticeregistrationestablishedprior;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,limitsituation.3.otherchattels,ownership,thevalueofthemortgageshouldbeimplemented,andwhetherfactorssuchaseasyhandling.(C)pledgeofcollateralinvestigationprocedures,investigatorsshouldenforcecollateralvalue,conveniencecustodyanddisposition,pledgerightseffectiveidentification,registration,etc.(D)guaranteeinvestigationtoensurethattheprocedures,theinvestigationshall,inaccordancewiththeborrower'sstandardstoinvestigatetheguarantorevaluationassurance.15thinformationauditsurveypeopledealwithborrowersandqualificationprovidedbytheguarantor,financialstatus,proofofidentity,theauthenticityofthedatacarefullyreviewed,verified,rationalityandeffectiveness.Include:(a)theborrowerdataauditing1.corporateclientsshouldfocusonassessingvarioustypesoflicenses,certificates,financialreporting,powersofAttorneyandothertextandarealplearelatedinformation.2.smallbusinessclasscustomersalsoshouldfocusonthereviewoftheborrowertoprovideevidenceofbusiness,financialpositionandactualcontrolofcredit,property,andmore离散型随机变量的数学期望和方差同步训练（选修2-3）姓名____________班级___________学号____________分数______________一、选择题1．已知随机变量，DEB则,32),2.0,10(的值A．4，1.6B．7，0.8C．7，6.4D．4，0.82．设是离散型随机变量，21(),()33PaPb，且ab．又42,,39ED则a+b的值为（）A．35B．73C．3D．1133．设～B（n，P），若有12E，4D，则n，P之值分别为A．15和14B．16和12C．20和13D．18和234．抛掷两个骰子，至少有一个4点或5点出现时，就说这些试验成功，则在10次试验中，成功次数ξ的期望是（）.A．103B．559C．809D．5095．已知随机变量ξ服从二项分布，且Eξ＝2.4，Dξ＝1.44，则二项分布的参数n，p的值为A．n=4，p＝0.6B．n＝6，p＝0.4C．n＝8，p＝0.3D．n＝24，p=0.16．设随机变量~(0,1)N，若()(01)Pxmm，则(||)Px的值等于（）A．2mB．12mC．12mD．12m7．已知随机变量ξ~B（n,p）,且E（ξ）=1.6,D（ξ）=1.28，则n,p分别是（）A．n=10,p=0.2B．n=8,p=0.2C．n=10,p=0.4D．n=8,p=0.48．若~,Bnp，且6,3ED，则P（1|）的值为A．42B．82C．232D．10329．已知随机变量的分布列为-101P216131且设12，则的期望值是A．1B．3629C．32D．6110．如图，旋转一次圆盘，指针落在圆盘3分处的概率为a，落在圆盘2分处的概率为b，落在圆盘0分处的概率为c，已知旋转一次圆盘得分的数学期望为2分，则ab的最大在平时的测量工作中，他积极做好传、帮、带工作，热心地把自己学到和掌握好的操作技艺毫无保留地传授给徒弟andactualcasewhethermatch;byislocatedlandrightnature;propertystatus,whetherhasdamageorqualityproblem;propertyusingsituation,rentaloruse;referencearoundsimilarpropertyprice,judgeassessmentvalueofrationality;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,anddemolition,andtransformation,limitsituation.2.tolandrightmortgageof,surveypeopleshouldverifiedfollowinginformation:landrightcardbycontainsMinginformation(rightpeople,andlocation,andnature,andterm,andarea,)andactualcasewhethermatch;landnature;landflatsituation;groundbuildingssituation;referencearoundsimilarlandprice,judgeassessmentvalueofrationality;mortgagerealwhetherhasothermortgagerightornoticeregistrationestablishedprior;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,limitsituation.3.otherchattels,ownership,thevalueofthemortgageshouldbeimplemented,andwhetherfactorssuchaseasyhandling.(C)pledgeofcollateralinvestigationprocedures,investigatorsshouldenforcecollateralvalue,conveniencecustodyanddisposition,pledgerightseffectiveidentification,registration,etc.(D)guaranteeinvestigationtoensurethattheprocedures,theinvestigationshall,inaccordancewiththeborrower'sstandardstoinvestigatetheguarantorevaluationassurance.15thinformationauditsurveypeopledealwithborrowersandqualificationprovidedbytheguarantor,financialstatus,proofofidentity,theauthenticityofthedatacarefullyreviewed,verified,rationalityandeffectiveness.Include:(a)theborrowerdataauditing1.corporateclientsshouldfocusonassessingvarioustypesoflicenses,certificates,financialreporting,powersofAttorneyandothertextandarealplearelatedinformation.2.smallbusinessclasscustomersalsoshouldfocusonthereviewoftheborrowertoprovideevidenceofbusiness,financialpositionandactualcontrolofcredit,property,andmore值A．481B．241C．121D．6111．随机变量服从二项分布～pnB,，且,200,300DE则p等于（）A．32B．31C．1D．012．已知随机变量的分布列为210123p121mn12161121其中)1,0[,nm，且61E，则nm,的值分别为（）A．121，21B．61，61C．41，31D．31，41二、填空题13．随机变量的分布列如下：-101Pa1312则(31E）的值是_____________．14．三封信随机投入A，B，C，D四个空邮箱，则A邮箱的信件数ξ的数学期望Eξ=15．一射手对靶射击，直到第一次命中为止，每次命中率为0.6，现在共有4颗子弹，则尚余子弹数目ξ的期望为16．从1，2，3，4，5这五个数中有放回地取两个数字，则这两个数之积的数学期望为．三、解答题17．某君向一目标射击，击中目标的概率为31在平时的测量工作中，他积极做好传、帮、带工作，热心地把自己学到和掌握好的操作技艺毫无保留地传授给徒弟andactualcasewhethermatch;byislocatedlandrightnature;propertystatus,whetherhasdamageorqualityproblem;propertyusingsituation,rentaloruse;referencear