Q. Out of 8 given points, 3 are collinear. How many different straight lines can be drawn by joining any two points from those 8 points?
A) 26
B) 28
C) 27
D) 25
Explanation
(a)
Required number of straight lines$= \ ^{8}C_{2} - \ ^{3}C_{2} + 1 = 26$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.