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Given independent random variables X and Y with means and

Given independent random variables, X and Y, with means and standard deviations as shown, find the mean and standard deviation of each of the variables in parts a to d.

a) X – 20

b) 0.5T

c) X + Y

d) X-Y

a) X – 20

b) 0.5T

c) X + Y

d) X-Y

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