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in Permutations and Combinations by (47.9k points)

Find the number of chords passing through 11 points on the circumference of a circle.

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Best answer

Number of the point on the circumference of circle = 11

We know that a chord is formed by joining two points.

Hence taking 2 points out of 11 points number of chords = 11C2

Hence, the number of chords = 55.

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