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What is the value of 3! × 2!?

Answer and explanation

Correct answer: 12

By definition, n! is the product of all positive integers from n down to 1. Thus, 3! = 3 × 2 × 1 = 6 and 2! = 2 × 1 = 2. Multiplying the two factorial values gives 3! × 2! = 6 × 2 = 12. Hence option A is correct. Option B may arise from adding 6 and 2 instead of multiplying them. Option C can result from an incorrect evaluation of one factorial, and option D is only the value of 3!, not the requested product. The important governing idea is that the multiplication sign outside the factorials must also be carried out after each factorial has been evaluated.

Related tags

Factorial NotationArithmetic EvaluationClass 11Permutations And CombinationsMathematicsClass 11 Mcq

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