12 points lie on a circle. How many cyclic quadrilaterals can be drawn by using these points?
Choose the most appropriate option.
A) 334	B) 377	C) 495	D) 766	E) 261
Explanation:   For any set of 4 points we get a cyclic quadrilateral. Number of ways of choosing 4 points out of 12 points is \inline {\color{Black}12C_4{}} = 495.   Therefore, we can draw 495 quadrilaterals   Answer: 495) 495
<result>C</result>
12 points lie on a circle. How many cyclic quadrilaterals can be drawn by using these points?