Maximum and minimum number of points of intersection of three lines are A and B

Question

Maximum and minimum number of points of intersection of three lines are A and B respectively. Then A+B = ?
__

Answer:
:
Three lines can intersect at 3 points (Maximum)
So, A = 3
Minimum number of points of intersection of three lines will be 1
So, B = 1

Hence, A + B = (3 +1) = 4.

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