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Consider a random variable X which takes on values 1 and 2 with probability 0.25 and 0.75, respectively . Determine the probability distribution function of X

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Definition. The cumulative distribution function (cdf) gives the probability that the random variable X is less than or equal to x and is usually denoted F(x) . The cumulative distribution function of a random variable X is the function given by F(x)=P[X≤x].