2019年高考數(shù)學(xué)(理)真題和模擬題分項匯編10 概率與統(tǒng)計(解析版)

DC．90-80+60=709從911779DAxxxxx．9x123489xxxxxxxxA5192348511(xxxxxx)(xxxx)x971234892348與Bxx11[(xx)(xx)(xx)]s[(x)(x)(x)]③S2222，22229711q238CxxxxD．9182X11aX131313P0a,．D(X)D(X)．D(X)D．D(X)．Daa.a1aE(X)，31a11a11a12116則D(X)((a)((a)，222233333392D(X)．a(chǎn)在a21(a22a22a2213(X)E(X)E(X)0[(a)]D，223399924D(X)．a(chǎn)在．53678898，6153]222222．6．0.982100.97200.98100.9939.2個數(shù)為10201040．0.60.54∶1．0.180.60.50.520.108,前30.40.60.520.072,224:1q0.1080.0720.18.4:1只BAB3記（．CPC，ab），．a(chǎn)b．a(chǎn)a．．．12X（PX“X．）X（．PX）X+．23X7XMME(X)2）．42，32~B)321P(Xk)C()(),k故X3k．kk333XX0123129498P2(X)32XE．3Y，2~B){3,{2,0}則YMXYXY．3{X3,Y{X2,Y0}與{X3}Y與{X2}Y0}與P(M)P({X3,Y{X2,Y0})P(X3,Y1)P(X2,Y0)P(X3)PY1)P(X2)PY0)824199．BB5ABAB人人9人3人1人人1BAB12X5XA3A，B．．從．931PC)P(D)．P(X2)P(CD)P(C)P(D)0.24，P(X1)P(CDCD)P(C)P(D)P(C)P(D)0.4(10.6)(10.4)0.60.52，P(X0)P(CD)P(C)P(D)0.24．XP012E(X)00.2410.5220.241．A．11P(E)．C34060306（PE（PEE411110α和．XXp(i0,1,,8)i4ip00p1papbpcp(1,2,,7)，i”，8ii1ii1a(X1)，bP(X0)，cP(X1)0.50.8，．{pp}(0,1,2,,7)ii1i求pp441p4257X1,0,1．P(X1)(1)，P(X0)(1)(1)，P(X1)(1)，X710X(1)(1)(1)(1)P0.4,b0.5,c0.1a．p0.4p0.5p0.1p0.1(pp)0.4(pp)，ii1ii1i1iii1pp4(pp)即．i1iii1ppp0，101{pp}(i0,1,2,,7)pi1i1pppppppp88776100(pp)(pp)(pp)877610418p．133p=18p1，4184114(pp)(pp)(pp)(pp)p1p．3257443322110p41，p4N(1,0)2(01)0.4(02)PP．0.4．0.8D．0.2．0.6BP(02)2P(01)20.40.8．82%DD(350020004500)2%100002%200，20002%40400.520．242XX．1．235．D．22A2211122，2241~B)41E(X)414∴XA．~(n,p)E()npB18021600149998．35,33,30．36,32,309．36,33,29D．35,32,31B180016001500，，，，，．33年522E)．．．D．575833A)ppEp1122ii2,3,42，339P3；553223(；4P555522494PE)234．5555s2x70,s75x70,s75．x．x．D．2270,s75x70,s7522A10x,s2x，x,x,,x，121[(x(x(x]則22222[(x(x(x，121222121[(x(x(x]s222222121[(x(x(x，22212s275．B是．成績在[70,80]人D分分D[70,80]A[40,60)0.2540000.251000B450.1550.15650.2750.3850.15950.170.5C[40,70)0.45[70,80]0.311D．[7,20)18[20,40)54[40,80)3666224122），3，）．66C2n226CC4為23222m61，36，6，，6．6．C62n，2612CC4這2m，2322m42P．n100520.40.20.150.20.252xx12E(x)x5xxxxx5E(x)x與x123451）））E(x)x．351015CC151(B)P10xBC215xxxxxE(x)x1234551AP()．313510152C215CC15110CC1021151P(B)10B．C215x可能取的值為8,5,3,105121P(xP(xP(x，，68351，P(x，561131(x)853E；656158533xE(x)x．又551001004220/kg元．12）1001010X3XE(X)．65）E(X)．14）計算出從100211064XX1）設(shè)從100PA()，A514X~)XB，5412(C()()PX2422，5521342E)