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Answer:
The probability distribution for a discrete random variable X can be represented by a formula, a table, or a graph, which provides p(x) = P(X=x) for all x. The probability distribution for a discrete random variable assigns nonzero probabilities to only a countable number of distinct x values.
Step-by-step explanation:
A "negative" random variable is one that is always negative - that is: P(X<0)=1.