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Class 11 Mathematics Permutations and Combinations Factorial notationHard

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What is the value of ( \frac{12!}{9!}-2\cdot\frac{11!}{8!} )?

Answer and explanation

Correct answer: (660)

The first term is (1320) and the second is (2\cdot330=660), so the difference is (660). Complete the multiplication in the coefficient term first.

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

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