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Class 11MathematicsPermutations and CombinationsCombinationsExpert
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Among (12) points, (5) points are collinear and no other (3) points are collinear. How many distinct lines are determined?

Answer and explanation

Correct answer: (57)

Total pairs are (^{12}C_{2}). The (^{5}C_{2}) pairs from collinear points give only (1) line, so (66-10+1=57).

Related tags

GeometryLinesCollinearCombinationsPermutations And CombinationsMathematicsClass 11 Mcq
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