=0.999*0.7+0.111*0.3*0.9=0.999*0.7+0.999*0.03=0.999*0.73=(1- 0.001)*0.73=0.73-0.00073=0.72927
(0.999+0.111)×(0.7+0.27)=1.11×0.97=1.0767
好