(Solved):
X1 and X2 are discrete random variables with the following probability ...
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X1? and X2? are discrete random variables with the following probability distribution function: f(x1?,x2?)=(X1?+X2?)/8 for (x1?,x2?)=(0,1),(0,2),(1,1),(1,2), and zero elsewhere. Express this probability distribution in a table, then find P(X1?>0?X2?<2) and var(2x1?+3X2?).