juwiede1811 juwiede1811 30-05-2023 Mathematics contestada (4) Let X represent the total number of four events A, B, C, D that occur. Assume P(A) = P(B) = 1/2, P(C) = P(D) = 1/4. (a) Calculate EX. (b) Assume events A, B, C, and D are pairwise independent. Calculate VarX.