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What is the value of 6!/4! − 2!?

Answer and explanation

Correct answer: 28

The relevant concept is factorial simplification together with the order of operations. Factorials are evaluated within their own terms before subtraction. Since 6! = 6 × 5 × 4!, the quotient 6!/4! simplifies to 6 × 5 = 30. Also, 2! = 2 × 1 = 2. Consequently, 6!/4! − 2! = 30 − 2 = 28. Therefore option B is correct. Option C is the quotient before subtracting 2!, so it represents an incomplete calculation. Options A and D cannot be obtained from the stated expression. Cancelling 4! is legitimate because it is a complete factor in 6!, but the subtraction must be performed only after the quotient has been simplified.

Related tags

Factorial NotationOrder Of OperationsClass 11 MathematicsPermutations And CombinationsMathematicsClass 11 Mcq

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