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If the moment-generating function of a random variable W is M(t) = (1 -7t) -2 where t If the moment-generating function of a random variable

If the moment-generating function of a random variable W is M(t) = (1 -7t) -2 where t

If the moment-generating function of a random variable W is M(t) (1 7t)-2 where t < 3. (i) Write the pdf of W. (ii) Write the mean and variance of W. (iii) What is the probability that W is at most 5?

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