∵x-B（n,p)
且Ex=3,Dx=1.5
∴np=3,np(1-p)=1.5
∴n=6,p=0.5
∴x-B（6,0.5)
∴P(x=0)=C(6,0)(0.5)^6=0.015625
P(X=6)=C(6,6)(0.5)^6=0.015625
∴p(1