Q. 134.4( 5 Votes )

How many chords c

Answer :

Number of points=21


n=21


A chord connects circle at two points.


r=2


Number of chords from 21 points= nCr


nCr= 21C2


21C2=


21C2=


21C2=


21C2=


21C2=210 chords.


Ans: 210 chords can be drawn through 21 points on a circle.


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