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Subjects
Class 11MathematicsPermutations and CombinationsCombinationsMedium
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Among (15) points (5) points are collinear and no other (3) points are collinear. How many lines can be formed?

Answer and explanation

Correct answer: (96)

Total pairs are (\binom{15}{2}=105) but (5) collinear points give (1) line instead of (\binom{5}{2}). Hence (105-10+1=96).

Related tags

CombinationsClass11MediumPermutations And CombinationsMathematicsClass 11 Mcq
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