Given, any four points in a plane such that each line contains at least two of these points. The maximum number of straight lines that can be drawn with any four points in a plane such that each line contains at least two of these points =4C2 =
4!
(4−2)!2!
=
2!3.4
2!2!
=6 Hence, the maximum number of straight lines that can be drawn with any four points in a plane such that each line contains at least two of these points is 6.