甲、乙两门高射炮彼此独立地向一架飞机各发一炮,甲、乙击中飞机的概率分别为0.4,0.5,则飞机至少被击中一炮的概率为____.
0.7。解析:设甲击中飞机的概率为p(A),乙击中飞机的概率为p(B),则p(AB)为甲、乙同时击中飞机的概率.故飞机至少被击中一炮的概率为:1-0.6*0.5=0.7
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