内容正文:
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1.D; 2.C; 3.D; 4.0,0.6; 5.0.7.
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A,B,C,D,E,
-
(1)P(A∪B)=P(A)+P(B)=0.24+0.28
=0.52,
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10
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9
$'01,
0.52.
(2)P(A∪B∪C∪D)=P(A)+P(B)+P(C)
+P(D)=0.24+0.28+0.19+0.16=0.87,
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7
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0.87.
(3)P(D∪E)=P(D)+P(E)
=0.16+0.13=0.29,
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0.29.
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1.B; 2.C; 3.B; 4.1415; 5.1.06.
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16 =
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A
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=>:
1.C; 2.B; 3.D; 4.C;
5.A; 6.D; 7.D; 8.C.
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、
@A:
9.25; 10.
8
15,
14
15.
B
、
+C:
11.
+
:(1)
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25+y+10=55,x+30=45,
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x=15,y=20.
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1×15+1.5×30+2×25+2.5×20+3×10
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P(A1)=
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100=
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100=
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A=A1+A2+A3,�A1,A2,A3�����(),
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= R + 12R =
3
2R,BD = OB
2-OD槡
2 =
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2 =槡32R,BC=2BD=槡3R,
S△ABC =
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= 槡334R
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(1,1),(1,2),
(1,3),(1,4),(1,5),(2,1),(2,2),(2,3),(2,4),
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(4,2),(4,3),(4,4),(4,5),(5,1),(5,2),(5,3),
(5,4),(5,5),
25
f�u()
,
S
P(A)=525=
1
5.
(2)
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B,
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:(1,1),(1,
3),(1,5),(2,2),(2,4),(3,1),(3,3),(3,5),(4,
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P(B)=1325,£©'01 P(C)
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12
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7.
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A:“
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B:“
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