Suppose X and Y are random variables with E(X) =10, std dev (X) = 3, E(Y) =15, and std dev (Y)= 4. Given that X and Y are independent, what are the mean and standard deviation of the random variable X - Y?

Answer is in the file below

cutt.ly/tz3yDpb

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square