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Class 11MathematicsPermutations and CombinationsCombinationsExpert
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Among (11) students, two particular students are (A) and (B). How many ways can (5) students be chosen so that at least one of (A) or (B) is selected?

Answer and explanation

Correct answer: (336)

Subtract ( \binom{9}{5} ), where neither (A) nor (B) is selected, from total ( \binom{11}{5} ), giving (336). For at least one, complement is simplest.

Related tags

Class11CombinationsAt-Least-OneComplementExpertPermutations And CombinationsMathematicsClass 11 Mcq
सुधार सुझाएँ / Earn

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