Out of 15 points in a plane, no three are on a straight line except 8 points which are collinear. How many triangles can be formed by joining them?

E

Editor

Sep 18, 2022

Out of 15 points in a plane, no three are on a straight line except 8 points which are collinear. How many triangles can be formed by joining them?

Difficulty: Hard

A:

40

B:

120

C:

1120

D:

504

ID: 63273dbaca83163ac3a124cd