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If X is a random variable and E(X) =1.5, then what is the value of E(3 + 4X)? |
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Answer» E(3 + 4X) = E(4x + 3) = 4.E(x) + 3 = 4.(1.5) + 3 = 6 +3 = 9 since E(ax+b) = aE(x)+b. |
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