JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

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Out of 18 points in a plane, no three are in the same straight line except five points which are collinear. The number of straight lines that can be formed by joining them is

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Correct option: B

144

Option B (144) is correct because it calculates the total number of lines minus the extra lines counted due to collinearity, plus one for the single line formed by the collinear points.

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