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Class 11 Mathematics Permutations and Combinations Factorial notationHard

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What is the value of ( \frac{9!}{5!\cdot4!} )?

Answer and explanation

Correct answer: (126)

Writing (9!) as (9\cdot8\cdot7\cdot6\cdot5!) and dividing by (4!) gives (126). This is a common form in combinations.

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Permutations Combinations Factorial Hard Factorial Notation Permutations And Combinations Mathematics Class 11 Mcq

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