There are n points in a plane , of which no three are collinear expept m which are collinear. Find the number of triangles formed by joining the points.

There are n points in a plane no three of which are in the same line excepting p points which are collinear . The number of triangle fomed by joining them is

There are 15 points in a plane, no three of which are collinear. Find the number of triangles formed by joining them.

There are 15 points in a plane, no three of which are collinear. Find the number oif triangles formed by joining them.

There are 21 points in a plane no three of which are collinear. The number of triangles formed by joining them is

Out of 18 points in a plane, no three are in the same line except five points which are collinear. Find the number of lines that can be formed joining the points.

Out of 18 points in a plane, no three are in the same line except five points which are collinear. Find the number of lines that can be formed joining the point.