What is the <strong>MAXIMUM</strong> number of points of intersection of 10 circles?
- A. 45
- B. 60
- C. 90 ✓
- D. 120
Correct Answer: C. 90
Explanation
Two circles intersect in at most 2 points. The number of ways to choose 2 circles from 10 is {}^{10}C_2 = 45. Thus, the maximum number of intersection points is 45 \times 2 = 90.
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