如题所述
解:设12345分别为ABCDE.F=P(C)P{(A+D)(B+E)}+(1-P(C))(P(AB)+P(DE)) =p(P(A+D)P(B+E)+2(1-p)p^2 =p(2p-p^2)^2+2p^2-2p^3 =p^5-4p^4+2p^3+2p^2