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Quiz 4.8 (A) From Example 4.8, random variables L and T have joint PMF PL,T (I, t) t = 40 sec t = 60 sec 1 = 1 page 0.15 0.1 1 = 2 pages 0.3 (4.95) 0.2 1 = 3 pages 0.15 0.1 For random variable V = LT, we define the event A = {V > 80}. Find the condi- tional PMF PL,TIA(I, t) of L and T given A. What are E[V | A] and Var[V | A]? (B) Random variables X and Y have the joint PDF fx, y ( x, y ) = xy/4000 1 80}. Find the conditional joint PDF fx,Y B(l, t) of X and Y given B. What are E[W |B ] and Var[W |B]