Question: A random variable X may assume four values with probabilities (1+30) (1 - 0) (1+20), and (140) For what values of 0 is this

A random variable X may assume four values with probabilities (1+30) (1 - 0) (1+20), and (140) For what values of 0 is this a 4 4 4 4 probability distribution?

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