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The maximum number of points of intersec...

The maximum number of points of intersections of three lines drawn in a plane is

A

1

B

2

C

3

D

6

Text Solution

AI Generated Solution

The correct Answer is:
To find the maximum number of points of intersection of three lines drawn in a plane, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Intersection Points**: - When two lines intersect, they can create a point of intersection. The maximum number of intersection points occurs when no two lines are parallel and no three lines are concurrent (i.e., they do not all meet at a single point). 2. **Calculating Points of Intersection**: - For each pair of lines, there can be one point of intersection. - The formula to calculate the number of intersection points from 'n' lines is given by the combination formula \( C(n, 2) \), which represents the number of ways to choose 2 lines from 'n' lines. 3. **Applying the Formula**: - For three lines (n = 3), we calculate the number of intersection points: \[ C(3, 2) = \frac{3!}{2!(3-2)!} = \frac{3 \times 2 \times 1}{2 \times 1 \times 1} = 3 \] 4. **Conclusion**: - Therefore, the maximum number of points of intersection of three lines drawn in a plane is **3**.
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Knowledge Check

  • The maximum number of points of intersection of 9 straight lines drawn in a plane is (i) 72 (ii) 36 (iii) 18 (iv) None of these

    A
    72
    B
    36
    C
    18
    D
    none of these
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