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Class 11 Mathematics Permutations and Combinations Factorial notationExpert

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If ( \frac{(n+3)!}{n!}+\frac{(n+1)!}{(n-2)!}=546 ), what is the value of (n)?

Answer and explanation

Correct answer: (6)

Putting (n=6) gives (9\cdot8\cdot7+7\cdot6\cdot5=504+210=714). Therefore the equation does not match the options.

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

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