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Let X be a discrete random variable with probability function
P( X = x) = 3 / 4^x for x =1.2.3 ....What is the probability that
X is odd ?
請問~ 這題 最後面說的 odd 是要...?!
因為 我只找到他是收斂.... ...
接下來該怎麼辦?!
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