Six points lie on the circumference of a circle. What is the positive difference between the number of triangles and the number of quadrilaterals that can be created by connecting these points?	Choose the correct choice from the following choices.
A) 4
B) 5
C) 6
D) 15
E) 20
Let's start with the triangle: You have 6 points to choose from but only 3 points you will connect and 3 points you will not connect.   Hence number of possibilities for triangle: 6! / 3! * 3! = 20   Same goes for the quadrilateral: 6 points to choose from, 4 points which you will connect and 2 points which you won't connect.   Number of possibilities for quadrilateral: 6! / 4! * 2! = 15   Difference = 5   Answer 5
<result>B</result>
Six points lie on the circumference of a circle. What is the positive difference between the number of triangles and the number of quadrilaterals that can be created by connecting these points?