Search found 2 matches
- by Chinmoy
Tue Jun 26, 2012 3:16 am- Forum: Problem Solving
- Topic: og math # 130
- Replies: 132
- Views: 58089
I did the math correct regarding 9C3. But i think we should subtract 9C2 to get rid of all the possible straight lines. Please suggest whether i am correct or not. According to me the answer which i am getting is 9C3-9C2 = 46. Thanks in advance.
- by Chinmoy
Tue Jun 26, 2012 3:03 am- Forum: Problem Solving
- Topic: How many triangles on the coordinate plane
- Replies: 131
- Views: 79941