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JEE MATHEMATICS MCQ: PERMUTATIONS

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Out of thirty points in a plane, eight of them are collinear. The number of straight lines that can be formed by joining these points, is

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Correct option: C

408

Option C (408) is correct because the total number of lines formed by 30 points with 8 collinear points is

{ }^{30} C_2-{ }^8 C_2+1 = 408

.

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