Question

There are 12 points in a plane no 3 of which are collinear except that 6 points which
collinear. The number of different straight lines is​

Answer 1

Answer:

m=12 n=6

12 points in a plane no 3 are collinear except 6 points are collinear

Straight line = mc2 - nc2 +1

=12c2 - 6c2 +1

= 66-15+1= 52