.
P (A 
A 
** n -1 An)= P (A ) P (A )*... * P (A 
) ( 
). (2).
.
3. . , , . 15 , 5 . , .
:
, 1, 2 3 - 䳿, , , , , .
= 1 2 , 1, 2 3.
Ρ () = Ρ ( 1 2 3) = ( 1) Ρ ( 2/ 1) ( \ 1 2) =5/15*4/14*3/13=0,011
, , , 0,011.
4.1.5. 䳿. 䳿 1,2,...,n , (1) = 1,, (2) = p2,,P(An)=pn; 䳿, , .
䳿 A, 1,2,...,n, 
:
(4.8)
, n , (4.8)
(A)=1- qn (4.9)
4. , . , , 0,95. , 0,9; 0,85; 0,8.
, ?
. = 0,95 - , . , =0,9; 
=0,85; 
= 0,8. , , :
:
.
5. . , 3 ?
: , 3, 
. q = 1 - p = 1 - 
.
() = 1 - 
:
.
5.
ί ²Ҳ. .
5.1.1. . , () 1, 2,..., n , 1, 2,..., n.
|
|
|
䳿 1, 2,..., n ,
= 1+ 2+...+ n,
, , 䳿 1, 2,... n:
()= ( 1)+ ( 2)+...+ (n).
, , (4.6),
(5.1)
5.1.2. . .
, , ¢ . , ( ¢ , ) . ,
( 1), ( 2),..., (n).
( 1).
() (5.1),
k = 1,2,..., n. (5.2)
(5.2) . , , ¢ .
5.2. .
1. 0,9, , 0,5, . , , 0,6.
1.1. , .
1.2.³, . , ?
1 2 .
( 1)=0,6; ( 2)=1-0,6=0,4.
, . ,
, ,
(5.2)
6. ˲Ҳ . ˲.
