2. Let X₁ and X₂ have the joint probability mass function (pmf)f(x₁, x₂) =, x₁ = 1,2, x₂ = 1,2.
(a) Are X₁ and X₂ dependent or independent? _(B)_.
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, x₁ = 1,2, x₂ = 1,2.