Home » Ask & Discuss » Mathematics. » Algebra « Back to Discussion

Algebra

New kid on the Block

Joined:	12 Jun 2008
Post:	24

7 Oct 2008 22:46:07 IST

0 People liked this

570

Permutatn and Combinatn Question From 'Arihant' Algebra Vol.1 pg 434 Eg.47 not getting ans

None

There are 'n' straight lines in a plane, no two of which are parallel and no three of these pass through the same point.Their points of intersection are joined. Find no. of new lines thus formed.

Share this article on:

Comments (2)

aatman

New kid on the Block

Joined: 12 Jun 2008

Posts: 24

7 Oct 2008 23:02:10 IST

Like 0 people liked this

I am getting the answer as : .125*(n^2-n)(n^2-3*n+6)

RyuAmakusa

Blazing goIITian

Joined: 21 Mar 2008

Posts: 776

8 Oct 2008 19:17:51 IST

Like 0 people liked this

from the q we can infer that there will be nC2 points and of these u select 2 points so the ans is (nC2)C2

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team