Question 7 1 pts Theorem: The average of any two real numbers is less than or equal to at least one of the two numbers. A proof by contradiction of the theorem starts by assuming which fact? For every two real numbers, X and y. (x+y)/2sx or (x+y)/2sy. For every two real numbers. X and y. (x+y)/2>xor (x+y)/2=y. There exists two real numbers. x and y. such that (x+y)/2>x and (x+y)/2>y. There exists two real numbers, and y, such that (x+y)/2x or (x+y)/2>y