设次品数XP (X=0)=(C90 5)/(C100 5)=0.58375 P (X=1)=(C90 4)(C10 1)/(C100 5)=0.32934P (X=2)=(C90 3)(C10 2)/(C100 5)=0.07022P (X=3)=(C90 2)(C10 3)/(C100 5)=0.00638P (X=4)=(C90 1)(C10 4)/(C100 5)=2.51*10^(-4)P (X=5)=(C10 5)/(C100 5)=3.347*10^(-6)