Question

In a plane there are 27 straight lines, of which 13 pass through
the point A and 11 pass through the point B. Besides, no three
lines pass through one point, no line passes through both points
A and B and no two are parallel. Find the number of points of
intersection of the straight lines​

Answer 1

Answer:

37C2,11C2,13C2+2=535...........,

the answer bis 535

Answer 2

Explanation:

Equilibrium position is same for both forward and backward reaction, if the other conditions are same. So the equilibrium constant for the backward reaction is 4.0 at identical condition