Question: Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of: a) X - 20 b) 0.5Y c)

Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of:
a) X - 20
b) 0.5Y
c) X + Y
d) X - Y
e) Y1 + Y2

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