Lot X_1, ..., X_n be independent and identically distributed continuous random variables having cumulative distribution function F(x). and let X_(i) denote the ordered sequence of the (realized values) of these random variables, i.e. X_(1) Solution a) P( Y > X) = X1 + X2 + X3 ... Xn b) P( X < Y < X ) = X1 + X2 +X3 + ... +X6.