It is important to remember that when something is "less than or equal to" the circle is filled and when something is only "less than" then the circle is empty.
Take a look at the attached pictures.
Math Guru
Jonny X: You've got two different answers because there are two different ways to interpret you question! The first, by MathGuru, with two different graphs, assumes you have two different problems: (1) x> 2 (2) x< 3. The second, by TheProf, assumes a single problem 2< x< 3.
They are, of course, both correct for the assumed question.