【单选题】【消耗次数：1】
设随机事件A与B相互独立，<imgwidth="118"height="21"v:shapes="_x0000_i1058"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image068.png">，则<imgwidth="77"height="21"v:shapes="_x0000_i1059"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image070.png">（）
①
0.6
②
0.75
③
0.25
④
1
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【单选题】
设<imgwidth="16"height="17"v:shapes="_x0000_i1188"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image265.png">与<imgwidth="16"height="17"v:shapes="_x0000_i1189"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image267.png">为两个随机事件，且有<imgwidth="88"height="21"v:shapes="_x0000_i1190"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image271.png">，则下列结论中正确的是（）
①
<imgwidth="152"height="21"v:shapes="_x0000_i1191"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image273.png">
②
<imgwidth="152"height="21"v:shapes="_x0000_i1192"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image275.png">
③
<imgwidth="90"height="21"v:shapes="_x0000_i1193"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image277.png">
④
<imgwidth="112"height="21"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image279.png">
【单选题】
设<imgwidth="73"height="21"v:shapes="_x0000_i1028"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image002.png">，则（）
①
A和B不相容
②
A和B相互独立
③
<imgwidth="61"height="21"v:shapes="_x0000_i1025"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image004.png">或<imgwidth="61"height="21"v:shapes="_x0000_i1026"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image006.png">
④
<imgwidth="111"height="21"v:shapes="_x0000_i1027"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image008.png">
【单选题】
设<imgwidth="32"height="21"v:shapes="_x0000_i1056"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image046.png">为两个随机事件，且<imgwidth="73"height="21"v:shapes="_x0000_i1057"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image048.png">，则<imgwidth="80"height="21"v:shapes="_x0000_i1058"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image050.png">（）
①
<imgwidth="37"height="21"v:shapes="_x0000_i1059"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image052.png">
②
<imgwidth="48"height="21"v:shapes="_x0000_i1060"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image054.png">
③
<imgwidth="66"height="21"v:shapes="_x0000_i1061"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image056.png">
④
1
【单选题】
<imgwidth="183"height="25"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image285.png">，且<imgwidth="21"height="25"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image287.png">与<imgwidth="22"height="25"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image289.png">相互独立，则<imgwidth="68"height="25"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image291.png">（）
①
<imgwidth="84"height="25"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image293.png">
②
<imgwidth="92"height="25"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image295.png">
③
<imgwidth="88"height="41"v:shapes="_x0000_i1200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image297.png">
④
<imgwidth="96"height="41"v:shapes="_x0000_i1201"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image299.png">
【单选题】
一枚硬币投掷两次，令<imgwidth="32"height="25"v:shapes="_x0000_i1040"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image032.png">“第<imgwidth="9"height="17"v:shapes="_x0000_i1041"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image034.png">次正面朝上”<imgwidth="55"height="21"v:shapes="_x0000_i1042"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image036.png">，则“至多有一次正面朝上可表示为（）
①
<imgwidth="80"height="26"v:shapes="_x0000_i1043"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image038.png">
②
<imgwidth="33"height="26"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image040.png">
③
<imgwidth="35"height="27"v:shapes="_x0000_i1045"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image042.png">
④
<imgwidth="50"height="25"v:shapes="_x0000_i1046"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image044.png">
【单选题】
设随机变量<imgwidth="13"height="15"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">和<imgwidth="13"height="17"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">的密度函数分别为<imgwidth="131"height="48"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image332.png"><imgwidth="140"height="50"v:shapes="_x0000_i1219"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image334.png">若<imgwidth="13"height="15"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">相互独立，则<imgwidth="57"height="21"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image336.png">（）
①
1
②
<imgwidth="16"height="41"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image338.png">
③
<imgwidth="15"height="41"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image340.png">
④
<imgwidth="16"height="41"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image342.png">
【单选题】
<imgwidth="14"height="14"v:shapes="_x0000_i1208"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image301.png">张奖券中含有<imgwidth="17"height="15"v:shapes="_x0000_i1209"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image303.png">张有奖的，今有<imgwidth="13"height="19"v:shapes="_x0000_i1210"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image305.png">个人每人购买1张，则其中至少有1个人中奖的概率为（）
①
<imgwidth="26"height="46"v:shapes="_x0000_i1211"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image307.png">
②
<imgwidth="56"height="48"v:shapes="_x0000_i1212"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image309.png">
③
<imgwidth="55"height="48"v:shapes="_x0000_i1213"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image311.png">
④
<imgwidth="46"height="48"v:shapes="_x0000_i1214"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image313.png">
【单选题】
设随机事件A与B相互独立，A发生B不发生的概率与B发生A不发生的概率相等，且<imgwidth="63"height="41"v:shapes="_x0000_i1060"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image072.png">，则<imgwidth="60"height="21"v:shapes="_x0000_i1061"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image074.png">（）
①
0.5
②
<imgwidth="15"height="41"v:shapes="_x0000_i1062"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image076.png">
③
<imgwidth="16"height="41"v:shapes="_x0000_i1063"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image078.png">
④
<imgwidth="16"height="41"v:shapes="_x0000_i1064"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image080.png">
【单选题】
设<imgwidth="90"height="25"v:shapes="_x0000_i1032"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image016.png">，则<imgwidth="87"height="21"v:shapes="_x0000_i1033"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image018.png">（）
①
<imgwidth="83"height="21"v:shapes="_x0000_i1034"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image020.png">
②
<imgwidth="83"height="21"v:shapes="_x0000_i1035"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image022.png">
③
<imgwidth="136"height="42"v:shapes="_x0000_i1036"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image024.png">
④
<imgwidth="136"height="42"v:shapes="_x0000_i1037"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image026.png">
【单选题】
<imgwidth="13"height="21"v:shapes="_x0000_i1174"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1175"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">的相关系数<imgwidth="50"height="26"v:shapes="_x0000_i1176"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image258.png">，表示<imgwidth="13"height="21"v:shapes="_x0000_i1177"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1178"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">（）
①
相互独立
②
不线性相关
③
存在常数<imgwidth="27"height="21"v:shapes="_x0000_i1179"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image260.png">使<imgwidth="116"height="27"v:shapes="_x0000_i1180"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image262.png">
④
满足<imgwidth="164"height="29"v:shapes="_x0000_i1181"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image264.png">
随机题目
【单选题】
数列的通项公式是<img class="kfformula" src="20190809/1565316958277756.png" data-latex="{a}_{n}=n\left ( {3n-1} \right )"/>,则它的第几项是70？（ ）
①
5
②
7
③
6
④
15
【单选题】
已知<img class="kfformula" src="20190809/1565317530438878.png" data-latex="a,b,c"/>是公比为2的等比数列，则<img class="kfformula" src="20190809/1565317530533557.png" data-latex="\frac {{b}^{2}} {ac}" width="74" height="64"/>等于（ ）
①
<img class="kfformula" src="20190809/1565317530127108.png" data-latex="\frac {1} {2}"/>
②
<img class="kfformula" src="20190809/1565317530414229.png" data-latex="1"/>
③
<img class="kfformula" src="20190809/1565317530771921.png" data-latex="\frac {1} {8}"/>
④
<img class="kfformula" src="20190809/1565317530451678.png" data-latex="\frac {1} {4}"/>
【单选题】
在数列<img class="kfformula" src="20190809/1565316783973080.png" data-latex="\left \{ {{a}_{n}} \right \} "/>中，前<img class="kfformula" src="20190809/1565316783992384.png" data-latex="n"/>项和公式是<img class="kfformula" src="20190809/1565316783683277.png" data-latex="{s}_{n}=4{n}^{2}-n"/>，那么<img class="kfformula" src="20190809/1565316783325652.png" data-latex="{a}_{2}"/>为（ ）
①
3
②
17
③
11
④
14