Question

Fifteen lines are drawn in a plane such that four of them are parallel. What is the maximum number of regions in which the plane is divided

Answer 1

So 15 lines can give 30 infinite regions. But 4 of them are parallel. So we get only 5 infinite regions instead of 8.

Answer 2

Answer:

So 15 lines can give 30 infinite regions. But 4 of them are parallel. So we get only 5 infinite regions instead of 8.

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