Вариант №3.
M(X) = = 1.9
D(X) = = 5.1
σ(X) = = 2.25
Пошаговое объяснение:
M(X) = 3*0.5 + 2*0.1 + 1*0.2 + 0*0.2 = 1.5 + 0.2 + 0.2 + 0 = 1.9
D(X) = 9*0.5 + 4*0.1 + 1*0.2 + 0 = 4.5 + 0.4 + 0.2 = 5.1
σ(X) =
= 1.9
= 5.1
= 2.25
