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【单选题】
甲、乙、丙三人各自独立地向某一目标射击一次,三人的命中率分别为0.5,0.6和0.7,则至多有两人击中目标的概率为 ( )
A.
0.09
B.
0.21
C.
0.44
D.
0.79
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