Question: X and Y are random variable with E[X] = E[Y] = 0 and Var [X] = 1,Var[Y] = 4 and correlation coefficient p = 1/2.

X and Y are random variable with E[X] = E[Y] = 0 and Var [X] = 1,Var[Y] = 4 and correlation coefficient p = 1/2. Find Var [X + Y].

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