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Let X] and X2 be independent random variables with the same mean m and variance o'. Let Z = Aithe. Find the mean and variance

Let X] and X2 be independent random variables with the same mean m and variance o'. Let Z = Aithe. Find the mean and variance of Z. Use Chebyshev's inequality to find an upper bound on the probability that Z is at least 20 away from its mean

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