XX 1-6. 2, V1 -3.
11-5; 2 1-3; 3 1-5; 5 1-3.
, .
: .
, , . , , .
: , .
, , .
, , (.. , , ).
, , .
, ,
:
.
.
3. , .
. I. ; 2. ;
3. ; 4. .
, , . (1) |
1. : , 6 4 () , . , .
.
: .
, , .
= 0,6.
(2)
(3)
. :
. (4)
, .. , ,
.
(5)
(6)
2. : , , , . , , .
. : ; . . (5) .
(1) . , , . .
3. . 0,3, 0,4, 0,5. , : ) ; ) ; ) ; ) .
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. :
A 1 ,
A 2 ,
A 3 ,
A, B, C, D,
A ,
B ,
C ,
D ,
P (A), P (B), P (C), P (D).
) A , A 1, A 2 A 3, A 1, A 2, A 3, .. A = A 1 × A 2 × A 3. , A 1, A 2 A 3 , ,
P (A 1× A 2× A 3) = P (A 1)× P (A 2)× P (A 3),
P (A 1) = 0,3; P (A 2) = 0,4; P (A 3) = 0,5.
,
P (A) = P (A 1× A 2× A 3) = P (A 1)× P (A 2)× P (A 3) = = 0,3×0,4×0,5 = 0,06.
) , , B = B 1 + B 2 + B 3, B 1 , B 2 , B 3 .
B 1, B 2, B 3 , B :
P (B) = P (B 1+ B 2+ B 3) = P (B 1) + P (B 2) + P (B 3).
B 1 , A 1 A 2 A 3, , B 1= A 1× 2 × 3, × i - , Ai, , Ai . B 2= 1× A 2× 3, B 3= 1× 2× A 3.
( 3 )
P () = 1 P (A), (7)
P ( 1) = 1 0,3 = 0,7; P ( 2) = 10,4 = 0,6; P ( 3) = 10,5 = 0,5.
A 1, A 2, A 3 , , A 1, 2, 3, (6)
P (B 1)= P (A 1× 2× 3)= P (A 1)× P ( 2)× P ( 3) = 0,3×0,6×0,5 = 0,09.
P (B 2)= P ( 1)× P (A 2)× P ( 3) = 0,7×0,4×0,5 = 0,14;
P (B 3)= P ( 1)× P ( 2)× P (A 3) = 0,7×0,6×0,5 = 0,21;
,
P (B) = P (B 1) + P (B 2) + P (B 3) = 0,09 + 0,14 + 0,21= 0,44
) C, ,
C = C 1+ C 2+ C 3,
C 1 ,
C 2 ,
C 3
C 1, C 2, C 3 .
P (C) = P (C 1)+ P (C 2)+ P (C 3).
,
C 1= A 1× A 2× 3, C 2= A 1× 2× A 3, C 3= 1× A 2× A 3,
P (C 1)= P (A 1)× P (A 2)× P ( 3)=0,3×0,4×0,5=0,06,
P (C 2)= P (A 1)× P ( 2)× P (A 3)=0,3×0,6×0,5=0,09,
P (C 3)= P ( 1)× P (A 2)× P (A 3)=0,7×0,4×0,5=0,14.
, P (C)=0,06+0,09+0,14= 0,29.
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) D . , D , .. .
, 1, 2 3, .. = 1× 2× 3.
, 1, 2 3 , , ,
P ()= P ( 1)× P ( 2)× P ( 3)=0,7×0,6×0,5=0,21.
D (7)
P (D)= 1 P () = 10,21 = 0,79.
: ) 0,06; ) 0,44; ) 0,29; ) 0,79.
XX 1-6. 2, V1 -3.
11-5; 2 1-3; 3 1-5; 5 1-3
n p, , n k (, ),
(10)
q = 1 p , ,
; , , 0! = 1, 1! = 1.
4. , 0,9.