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Class 11 Mathematics Permutations and Combinations Factorial notationExpert

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What is the value of (\frac{9!}{7!}+\frac{8!}{6!})?

Answer and explanation

Correct answer: (128)

Here (\frac{9!}{7!}=72) and (\frac{8!}{6!}=56) so the sum is (128). In exams cancel larger factorials quickly.

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Factorial Notation Simplification Expert Permutations And Combinations Mathematics Class 11 Mcq

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