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

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