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Please help. a) X25 b) 0.5Y c) X+Y d) XY a) Find the mean and standard deviation for the random variable X25. E(X25)=SD(X25)= (Type integers

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a) X25 b) 0.5Y c) X+Y d) XY a) Find the mean and standard deviation for the random variable X25. E(X25)=SD(X25)= (Type integers or decimals rounded to two decimal places as needed.)

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