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What is the value of \(\frac{11!}{8!\cdot3!}\)?

Answer and explanation

Correct answer: 165

Cancel \(8!\) from \(11!\): \(\frac{11!}{8!\cdot3!}=\frac{11\cdot10\cdot9}{3\cdot2\cdot1}=\frac{990}{6}=165\). Hence, 165 is the correct option. An answer such as 180 can result from not dividing correctly by \(3!\). Exam tip: In factorial fractions, expand the larger factorial only up to the smaller factorial, then cancel common factors.

Related tags

Factorial NotationPermutations And CombinationsFactorial SimplificationClass 11 MathematicsBinomial CoefficientMathematicsClass 11 Mcq

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