probability swimm suppose the function below is the PDF of a continuous random variable X. 0, for x 3 Find the exact value of the mean of X, simplified to a reduced fraction. You are welcome to check your work using decimal approximations, but only work with exact numbers will receive credit. what I know . we set up integral M = ( x . f ( x ) d z . we compute S. I'dx = 3 how ? and why ? . compute S Edx = 1 how