Question: Let X be a discrete random variable with a probability mass function ( pmf ), px(x) , given by px (1) = 0.25 px (2)

Let X be a discrete random variable with a probability mass function (pmf), px(x), given by 


px (1) = 0.25

px (2) = 0.3

px (3) = 0.15

px (4) = 0.2

px (5) = 0.1

The value of E[X^4] is ? 


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