Question

How many lines can be drawn through 18 point on a circle​

Answer 1

Given :- How many lines can be drawn through 18 point on a circle ?

Answer :-

we know that, a line has two end points . Let total x lines are drawn through 18 point on a circle .

so,

→ x = 18(C)2

→ x = 18! / (18 - 2)! * 2!

→ x = 18 * 17 * 16! / (16! * 2!)

→ x = 18 * 17 / 2

→ x = 9 * 17

→ x = 153 lines (Ans.)

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