X is a discrete random variable that can have values from 0 to infinity, and occurrences of the events X counts are independent. The standard deviation of X is equal to the square root of the mean. The probability distribution of X is a（n）（）distribution.

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A. binomial

B.uniform

C.normal

D.Possion

正确答案：Possion

Tag：时间：2022-05-24 20:15:47

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