Question 93

If there are four lines in a plane, then what cannot be the number of points of intersection of these lines?

Solution

Maximum number of intersection points of $$n$$ lines = $$\frac{n(n-1)}{2}$$

Thus, in a plane of 4 lines, maximum intersection points = $$\frac{4\times3}{2}=6$$

=> 7 is not possible.

=> Ans - (D)

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