Let random variables 𝑋 and 𝑌 have a joint 𝑝 𝑚 𝑓 of: 𝑓 ( 𝑥 , 𝑦 ) = 𝑥 + 𝑦 8 , 𝑥 = 1 , 2 𝑦 = 0 , 1 Calculate the following and choose the correct answer for each: marginal 𝑝 𝑚 𝑓 of 𝑋 = 𝑓 ( 𝑥 ) is f(x) = (2x+1)/8 the marginal 𝑝 𝑚 𝑓 of 𝑌 = 𝑓 ( 𝑦 ) is f(y) = (3+2y)/8  多重下拉选择题

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