V , ( 1- 2-), 40% 60%. , 1- 90% 2- 20 %. . ?
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2 2- .
: P(H1)=0.4, P(H2)=0.6. ( ): (A|H1)= 0.9, (A|H2)= 0.2.
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1. :
Pn(k1 ≤ k ≤ k2) = -.. .
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Pn(k ≥ 1) = 1 qn = 1- Pn(k=0) = 1- Cn0p0qn=1-qn
V 10 . 0.5, :
a. , 5 ;
b. , 5 ;
c. , 1 .
Ï ) 10(=5) = 105(1/2)5(1/2)5 = (1/2)10≈0,246;
b) 10(0≤ ≤ 5) = 10(1/2)n(1/2)n-k = (100+101 +102 +103 +104+105)/1024 ≈0.623;
c) 10(k≥1) = 1 (½)10 = 1-1/1024 = 1023/1024 ≈ 0.999. N
V 6 . , . , 4 .
Ï 6(=4) = 64 0.754 0.252 = ≈0.3. N
1654-1705
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