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What is the value of \(5!\div3!\)?

Answer and explanation

Correct answer: 20

\(5!\div3!=\frac{5\times4\times3!}{3!}\). The common factor \(3!\) cancels from the numerator and denominator, leaving \(5\times4=20\). Choosing 15 would result from an incorrect cancellation of the factorial terms. Exam tip: In factorial division, expand the larger factorial only up to the smaller factorial and cancel common factors.

Related tags

Factorial NotationFactorial DivisionPermutations And CombinationsClass 11 MathematicsMathematicsClass 11 Mcq

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