LAB27

Pa=0.15+0.425Pc  (1)
Pb=0.15+0.85Pa    (2)
Pc=0.15+0.85Pa+0.85Pb    (3)
(1)代入(2)
Pb=0.15+0.85(0.15+0.425Pc)
    =0.15+0.1275+0.36125Pc   (4)
(1)(4)代入(3)
Pc=0.15+0.85(0.15+0.425Pc)+0.85(0.15+0.1275+0.36125Pc)
    =0.15+0.1275+0.36125Pc+0.1275+0.108375+0.3070625Pc
    =0.513375+0.6683125Pc
0.3316875Pc=0.513375

Pc=1.5477671

Pb=0.15+0.1275+0.36125*1.5477671=0.83663086
Pa=0.15+0.45*1.5477671=0.807801012

Pc>Pb>Pa