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Let X~B(2,1/2), where B(n,p)denotes the binomial distribution with paramete

Let X~B(2,1/2), where B(n,p)denotes the binomial distribution with parameters n and p. Then the expected value of 2/(1+X) equals A. 2/3 B. 6/7 C. 1 D. 7/6

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