概车纶与款理统外 P{X≥5.5}=1-P{X<5.5} =1-P{X≤5.5}+P{X=5.5} =1-1+0=0. P1<X≤3}=P{X≤3}-PX≤1} =F3)-F(1) 1 41 -8= 21P{X  5.5}= 1− P{X  5.5} P{1  X  3}= P{X  3}− P{X  1} = F(3) − F(1) = 1− P{X  5.5}+ P{X = 5.5} = 1− 1+ 0 = 0. 8 4 = 1 − . 2 1 =