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How many ways are there to select (1) question from (9) questions?

Answer and explanation

Correct answer: 9

When exactly one question is selected from 9 questions, each question gives one distinct selection. Therefore, the number of ways is \(\binom{9}{1}=9\). Option 8 is incorrect because it represents the number of ways to leave out one question, not to select one question. Exam tip: apply the identity \(\binom{n}{1}=n\) directly.

Related tags

CombinationsBinomial CoefficientsClass 11 MathematicsSelection ProblemsPermutations And CombinationsMathematicsClass 11 Mcq

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