Determine E (X) and V(X) x -1.0 -0.5 0.5 1.0 a. E(X) = 1/8 V(X) = 0.4219 b. None O c. E(X) = 0 V(X) = 2.50 O d. E(X) = 0 V(X) = 0.75 y -2 -1 1 2 f(x, y) 1/3 1/6 1/6 1/3

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