1. The problem statement, all variables and given/known data Let the independent random variables X1,X2,X3 have the same cdf F(x). Let Y be the middle value of X1,X2,X3. Determine the cdf of Y. 2. Relevant equations F(x) = P(X<=x) = ∫-inf to x f(y)dy 3. The attempt at a solution I don't understand the question, what does it exactly mean when Y is the middle value of X1,X2,X3? I'm not exactly sure where to start. Can somebody help?