discrete why do i keep getting it wrong (1 Viewer)

yashbb

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Var(X) = E(X^2) - E(X)^2 = 2.6 - 0 = 2.6

E(X^2) = 4(0.3) + 1(0.1) + 0(0.2) + 1(0.1) + 4(0.3) = 2.6

E(X)^2 = (-2(0.3) - 1(0.1) + 0(0.2) + 1(0.1) + 2(0.3))^2 = 0
i did 0.2x0= 0.2...
Thank You!!!!!
 

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