Consider a situation in which p(x) =4/5 and p(y) =1/4 . if p(x and y) is =1/5 , which best describes the events? they are independent because p(x) · p(y) = p(x and y). they are independent because p(x) + p(y) = p(x and y). they are dependent because p(x) · p(y) = p(x and y). they are dependent because p(x) + p(y) = p(x and y).