河北省巨鹿县2023年高考冲刺模拟数学试题含解析

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2023
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17P(x=6)=P(x=7)=(P(y=6)=2P(y=7)=:P(y=8)=,P(z=7)=?,P(z=8)=!232644oYᓫ>qoᜓhiᨴ9kᵨ᧕ὑ^Ḅ\ᦪsᦪ$X,!jP(X>21)=P(X=22)+P(X=23)|P(X=22)=B(x=6,y=8,z=8)+P(x=7,y=7,z=8)+P(x=7,y=8,z=7)1111111137=—X—X--F—X—X-----F—X—X—=——,26422426448P(X=23)=P(x=7,^=8,z=8)=^xlxl=^711ᦑB஺>21)=—+—=h48486ᓽYᓫhiᨴ9A,B,C>qoᜓkᵨḄ᧕ὑ^sᦪ§¨21\Ḅᭆ᳛$.6(2)©⚪M1,Xᡠᨵ-~ḄQ$19,20,21,22,231131p(X=19)=P(x=6,y=6,z=7)=xx=;11111311317P(X=20)=P(x=6,y=6,z=8)+(x=6,y=7,z=7)+P(x=7,y=6,z=7)=lxx+xx+xx=—23422423448P(X=21)=P(x=6,y=7,z=8)+(x=6,y=8,z=7)+P(x=7,y=6,z=8)+P(x=7,y=7,z=7)111113II111317=—X—X—+—X—X—+—X—X—+—X—X—=——•2242642342244871ᵫ(1),P(X=22)=—,P(X=23)=—,4848°YᓫᙠZ[oᜓḄJZ[±20\᧕ὑ^oYᓫhiᨴ9Z[᧕ὑ^ᡠ◤Ḅsᵨ$³ᐗᑣ³Ḅᡠᨵ-~Q$2000,22(X),24(X),2600,11723P(Y=2000)=P(X=19)+P(X=20)=+—=—}17µ(³=2200)=P(X=21)=—7P(¶=2400)=P(X=22)=—P(K=2600)=P(X=23)=£231771EY.=2000x—+2200x—+2400x—+2600x—®2142'48484848°Yᓫᙠ»[oᜓḄJZ[±21\᧕ὑ^oYᓫhiᨴ9Z[᧕ὑ^ᡠ◤Ḅsᵨ$ᓃᐗᑣYḄᡠᨵ-~2Q$2100,2300,2500,117175µ¾=2100)=P(X=19)+P(X=20)+P(X=21)=+—+—=h7P(Y=2300)=P(X=22)=—2

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