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Class 11 Mathematics Permutations and Combinations Factorial notationHard

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When (n=4), what is the value of ( \frac{(n+4)!}{n!} )?

Answer and explanation

Correct answer: (1680)

Putting (n=4) gives ( \frac{8!}{4!}=8\cdot7\cdot6\cdot5=1680 ). Understand the general form before substituting.

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

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