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# 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? Details and assumptions If k chor

i am asking what ( k 2) means

Note by Superman Son
3 years, 10 months ago

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You could have just asked that question without pasting the brilliant problem... · 3 years, 10 months ago

right i thought that it would be tough for me to specify the qs · 3 years, 10 months ago

Lol. True that. · 3 years, 10 months ago

$$\frac{n!}{k!(n-k)!} = \binom{n}{k}$$ · 3 years, 10 months ago