There are 12 points in a plane. The number of the straight lines joining any two of them when 3 of them are collinear is a. `62` b. `63` c. `64` d. 65

There are 10 points in a plane and 4 of them are collinear. The number of straight lines joining any two of them is a. 4 b. 40 c. 38 d. 39

There are 12 points in a plane in which 6 are collinear. Number of different straight lines that can be drawn by joining them, is a.51 b.52 c.132 d.18

There are 12 points in a plane of which 5 are collinear . Find the number of straight lines obtained by joining these points in pairs .

There 12 points in a plane of which 5 are collinear . Find the number of straight lines obtained by joining these points in pairs.

How many triangles may be formed by joining any three of the nine points when five of them are collinear?

There are 12 points in a plane in which 6 are collinear. Number of different triangles that can be drawn by joining them is

How many triangles may be formed by joining any three of the nine points when no three of them are collinear ,

Find the number of straight lines that can be drawn through any two points out of 10 points, of which 7 are collinear.

There are 15 points in a plane, no three of which are in the same straight line with the exception of 6, which are all in the same straight line. Find the number of i. straight lines formed, ii. number of triangles formed by joining these points.

Three are 12 points in a plane, no of three of which are in the same straight line, except 5 points whoich are collinear. Find (i) the numbers of lines obtained from the pairs of these points. (ii) the numbers of triangles that can be formed with vertices as these points.