In a certain circle there are 10 points. What is the number of the triangles connecting 5 points of the 10 points?  Choose one:
A) 80
B) 96
C) 108
D) 120
E) 252
IMO : E   HERE we have to select 5 points out of 10 points. Order is not important   So the answer will be 10c5 = 252   Answer 252
<result>E</result>
In a certain circle there are 10 points. What is the number of the triangles connecting 5 points of the 10 points?