Suppose that discrete random variable X~uni[1,2,3] A random sample of n=36 is selected from this population. Find the probability that the sample mean is greater than 2.1 but less than 2.5, assuming that the sample mean would be measured to the nearest tenth.

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A: sorry for Question 2,4 and 5 because that is not form my subjects. i can give only 3rd's answer

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