Hi guys, Suppose I have the function [itex]x = a + b -1[/itex] where a, b have expected values of 0.5 each. What is the expected value of x? is it 0.5 + 0.5 -1 = 0? or is it just 0.5 + 0.5? Secondly, suppose the same equation as above, [itex]x = a + b -1[/itex]. If the variance of both a and b is 1/12, what is the variance of x? I know this is really basic but I just dont understand. Thanks guys!