1概率论与数理统计第二章习题)()()()()式,有利用(显然)()(则若))(()()(从而)()()()(的可加性,有:互不相容,因此由概率与而)(则解:ABPAPABAPBAPAABABAPBAPABBPAPBAPBAPBPBABPAPBABCABAAB**.132)(1)()()(1)()()()|()4(2.05.01.0)()()|()3(25.04.01.0|)2(8.0)1(.2BPABPAPBPBAPBPBAPBAPAPABPABPBPABPBAPABPBPAPBAP)()()()()()()(解:7.0)(1)|(1)|()4(4.0)(1)|(1)|()3(72.0)()()()()()()()()2(3.0)()()()()()()|(1.3APBAPBAPBPABPABPBPAPBPAPABPBPAPBAPBPBPBPAPBPABPBAP)解:()()()()()(”成立时“或当)()(”成立时“)(当)()()()()()()(解:BPAPBAPAPABPAABBABABPAPBAAABPBAPBPAPABPBPAPBAP0.42)()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()解:(CPBAPCPBAPCPBPAPCBAPCBAPCPABPCPBPAPABCPCABPBAPCPABPBPAPCPBPAPBPAPCPCPBPAPCPBPCPAPABCPBCPACPBCACPCBAP][][3][2][][][1.7832.04.03.06.03.04.03.06.04.06.03.04.06.0)()()()()()()()()(3.04.0200150)(4.06.0150100)(6.0200150100.8ABCPCAPBCPABPCPBPAPCBAPDPCPBPAPDCBA)(“击中目标”米处射击”“相距米处射击”“相距米处射击”“相距解:设2112632112|31812|6)2(3.0185|8)1(.9222222222222111111111)()()()()()()(”“点数和大于“点数和为奇数”)()()()()(”“点数和为“点数和为偶数”解:BPBAPBAPAPBAPABPBAAPBPAPBAPABPBA35360160126047514131413141513151413151413151.10)()()()()()()()()(,)(,)(“丙破译密码”“乙破译密码”“甲破译密码”解:ABCPBCPACPABPCPBPAPCBAPCPBPAPCBA61|1011|.11110)()()()()()(解:BPABPBAPCAPABPABP1025515510530520|12CCCCCABPAPABPBA)()()(球各半”“第二次取出的黄、白球”“第一次取出的全是黄。解:cbaacbacbbabAAAPAAPAPAAAPAAA2||32.13213121321321)()()()(次取白球”“第次取黄球”“第“第一次取黄球”解:4161013616101474113161013469677036937067||21610147469667067|12.1421121121212121211212121)()()()()()()()()()()()()()()(“被退货”次抽到次品”“第“第一次抽到次品”解:AAPDPAAPAPAAPAPAAPAAPAAAAPAAPAPAAPDAA493297%4.1153)]|(1[)()()|()|()3(73%4.153%1)()()|()|()2(%4.152%253%1||1525330001800%2|%1|.15111111122112121BAPAPBPBAPABPAPBPBAPABPBPBAPBPBAPAPBPBPBAPBAPA)()()()()()()(,)()(,)(“次品”解:17.00545.005.09.01)()()|(1)|(1)|()2(0545.00095.0045.095.001.005.09.0)()]|(1[05.09.0)()|()()|()()1(05.0)(99.0)|(9.0|.16BPAPABPBAPBAPAPABPAPABPAPABPBPAPABPABPBA)(“某方法检验为次品”“次品”,解:55000380500018020035000180025000180180%630003000535000200%10200020005250001,17)()()()()(,女生选修会计人数女生人数:,男生选修会计人数)男生人数:(解:CPBPAP.9994.041)3(0006.00391.01%3%981||27519.0%97%1%3%98%3%98||0391.0%97%1%3%98]|1[%3%98||1%99|%98|%3.18)(正确率达到基本上是没有患肺癌的结果是未患肺癌者病机构而言,相信检查检查。对地区医疗、防准备再作进一步率)未患肺癌,可积极左右的可能性(主观概于紧张,还有出患肺癌,他可不必过对于被检查者,若被查)()()()()()()()()()()()()()()()()()()(,)(,)(“患有肺癌”“诊断为患肺癌”,解:APBPBAPABPAPBPBAPABPBPBABPBAPBPBAPAPBAPBAPBPBA6896863.001.07.0)02.01((7.0)02.01()()|()()|()()|()|(01.0)|(,02.0)|(3.0)(,7.01010.19APABPAPABPAPABPBAPABPABPAPAPBBAA)(”“收到”,“收到”,“发送”,“发送解:6968.0)()()()()()(])[()()4(032.0)|()|(1)|()3(242.062.03.05.0)()()|()|()2(726.062.05.09.0)()()|()|(62.02.01.03.05.05.09.0)()|()()|()()|()()1(1.0)|(5.0)|(9.0)|(2.0)(3.0)(5.0)(200.2021212121213222111332211321321321BPBAPBAPBPBABAPBPBAAPAAPBAPBAPBAPBPAPABPBAPBPAPABPBAPAPABPAPABpAPABPBPABPABPABPAPAPAPBAAA台以上”“卖出“滞销”,“一般”,“畅销”,解:775.04.013.04302211.04100|]||[|]||[]|[P]||[3(4.05.0511)(3.05.05143)|(2.05.05121)|(1.01015.05141|05.00||25.0]14321410[515115141510|||1iB.215522115432111552211i)()()()()()(“再次出现字面”))()()()()()()()()()()()()()(个硬币”“取出第“出现字面”,解:ABPABCPABPABCPABABCPCPCABPABPABPABPAPBPBAPABPBPBAPBPBAPBPBAPAPA8458.014.0141.06.036.02.0)()|()()|()()|()(14.07.05.04.0)()(41.07.05.06.07.05.04.03.05.04.0\)()()()()()()()()()()()()()(36.07.05.06.03.05.06.03.05.04.0.2233221132133213213213213213213213213212321321321323213213213213211321321APABPAPABPAPABPBPCCCPAPCPCPCPCPCPCPCPCPCPCCCPCCCPCCCPCCCCCCCCCPAPCPCPCPCPCPCPCPCPCPCCCPCCCPCCCPCCCCCCCCCPAPCCCBAAA)()()()()()()()()()()()()()(“丙射击”“乙射击”,“甲射击”,“飞机被击落”“三人击中”“两人击中”,“一人击中”,解:设98639.0]9524.0[)(9524.0)(9524.0)()|()()|()(9524.004.005.096.099.0||100961004100498961004100969895100961004989510096100969894)()AA|A)AAP|||1009610049996100969995||10096321321.23332132222222111111121213212132121321213311211221321321BBBPBPAPABPAPABPBPAPABPAPABPBPAAPPAAAPAAPAAAPAAPAAAPAPAPAAPAPAAPAPAPBBBAAA)()()()()((()()()()()()()()()()()()(次检验出的是正品”“第次检验出的是正品”“第次检验出的是正品”“第次抽出的是正品”“第次抽出的是正品”“第次抽出的是正品”“第解:———109824076097960||27609206097960||19297632222176316161263252520|||060|040|2217|1612|2520|63226316632522162525.24332211321321321)()()()()()()()()()()()()()()()()()()()(,)()(,)(,)()(,)(,)(”“第三箱中抽出的产品”“第二箱中抽出的产品”,“第一箱中抽出的产品“检验为合格品”“取出的为合格品”,解:设BPAPABPBAPAPABPAPABPBPAPCPCAPCPCAPCPCAPAPABPABPCAPCAPCAPCPCPCPCCCBA