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NDA2023MathematicsPermutation and CombinationActual

What is the maximum number of points of intersection of 10 circles?

Options

  1. A45
  2. B60
  3. C90
  4. D120

Correct answer

C. 90

Step-by-step solution

since, maximum number of points of intersection of 10 circle = ¹⁰ C ₂ 2= 10 9 2 2=90

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