If `20` lines are drawn in a plane such that no two of them are parallel and so three are concurrent, in how many points will they intersect each other?

If 20 lines are drawn in a plane such that no two of them are parallel and no three are concurrent. In how many points will they intersect each other ?

If 20 lines are drawn in a plane such that no two of them are paralled and no there are concurrent, in how many points will thay intersect each other ?

If 10 lines are drawn in a plane such that no two of them are parallel and no three are concurrent, then the total number of points of intersection are

If 10 lines are drawn in a plane such that no two of them are parallel and no three are concurrent, then the total number of points of intersection are .... …..

If 10 lines are drawn in a plane such that no two of them are parallel and no three are concurrent , then total number of points of intersection are …………

25 lines are drawn in a plane. Such that no two of them are parallel and no three of them are concurrent. The number of points in which these lines intersect, is:

25 lines are drawn in a plane. Such that no two of them are parallel and no three of them are concurrent. The number of points in which these lines intersect, is: