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QUESTION 211. IfX andY are random variables with E(X) =5 and E(Y) = 3, then E(2X – 3Y) is:a.1b.15c.21d.42e.None of the above0.5 points QUESTION 221. A multiple-choice quiz has 25 questions. Each question has four possible answers, of which only one is correct. The probability that sheer guesswork will yieldat least 7 correct answers is:a.0.02b.0.06c.0.18d.0.44e.None of […]