Sam, Mamie, Ralph and Gail are all skilled at the video game alien Invaders. Gailconsistently scores higher than Ralph. Sam is better than all of them and Mamie isbetter than Ralph. Who is the better player, Gail or Mamie?

Both Mamie and Gail play better than Ralph.
Explanation:
3) The symbol > will be used to represent scores higher than the other
Gail > Ralph
Sam > Gail, Ralph and Mamie
Mamie > Ralph
From the question, we are not told relationship between Mammie and Gail.
That is the information about their scores is not given.
Gail scores better than Ralph
Mamie also scores better than Ralph.
We don't have enough information to determine who is the better player. Both Mamie and Gail play better than Ralph.