Posted by **Mathslover Please help** on Wednesday, May 8, 2013 at 1:57am.

Two points are chosen uniformly at random on the unit circle and joined to make a chord C1. This process is repeated 17 more times to get chords C2,C3,…,C18. What is the expected number of pairs of chords that intersect?

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**jelly**, Wednesday, May 8, 2013 at 7:53am
137

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**luntry**, Wednesday, May 8, 2013 at 7:54am
349

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**Athul**, Thursday, May 9, 2013 at 1:19pm
How

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**Anonymous**, Friday, May 10, 2013 at 11:36am
both r incorrect

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**a**, Monday, May 13, 2013 at 10:06am
51

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