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【单选题】
若随机变量X服从二项分布B(n,p),则下列式子中正确的是( )A.
E（2X-1）=2np
B.
E(2X+1)=4np+1
C.
E(2X)=4np
D.
E(2X+2)=2np+2
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举一反三
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