There are 10 points in a plane of which 4 are collinear, Find the number of lines obtained from the pairs of these points.

There are 10 points in a plane of which 4 are collinear, find the number of triangles that can be formed from these points.

There are n points in a plane of which m points are collinear. How many lines can be formed from these points ?

There are 10 points on a plane of which no three points are collinear. If lines are formed joining these points, find the maximum points of intersection of these lines.

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 10 points in a plane of which no three points are collinear and four points are concyclic. The number of different circles that can be drawn through at least three points of these points is (A) 116 (B) 120 (C) 117 (D) none of these

There are 10 points in space of which 5 points are in the same plane, but no four of the remaining 5 points are in the same plane. The number of planes each containing three points is-

There are 15 points in a plane of which 4 points lie in one stright line and another 5 points lie in another straight line . The two lines are parallel and no three of the remaining 6 points are collinear . Find (a) the number of straight lines and (b) the number of trangles that can be formed by joining the 15 points .

n points are in space ,no three of which are collinear .if the number of straight lines and triangles , with the given points oniy as the vertices ,obtainted by joining them are equal ,find the value of n .

(3) Let's draw 5 points which are collinear.

In a plane there are 10 points out of which no three are collinear except the four which lie on a straight line .By joining these 10 points how many (a) straight lines , (b) trangles can be obtained ?