1+1*2=1 1*(1+2)=1
6.2
Z , Z=1 , , Z=0 , .
:
Z= 1*2.
Z= 1+2.
Z .
, =1 , , =0, .
:
.
, :
2 3
1 7
6
4 5
6.1
Z .
, . , , .
, , . , .
6.3
,, Z, l - 1- , ,.:
l = P1*P2*P3*P7
:
ll =P1*P2*P3*P7
lll =P1*P2*P6*P5*P7
lV =P1*P4*P6*P3*P7
=1-(1- l)*(1- ll)*(1- lll)*(1- lV).
Q :
Q=1-P=(1- l)*(1- ll)*(1- lll)*(1- lV).