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What is the value of \(2!\cdot3!+4!\)?

Answer and explanation

Correct answer: (36)

Factorials should be evaluated before combining the terms. The factorial \(n!\) is the product from \(n\) down to 1, so \(2!=2\), \(3!=6\), and \(4!=24\). The dot between the first two factorials means multiplication, and multiplication is performed before the addition. Thus the expression has value 36, which is option B.

Calculate the product first: \(2!\cdot3!=2\cdot6=12\). Then calculate the remaining factorial, \(4!=4\cdot3\cdot2\cdot1=24\). Add the two results: \(12+24=36\). The answer is not 30, 42, or 48 because those values result from an arithmetic or order-of-operations mistake. Therefore option B follows.

Related tags

Factorial NotationOrder Of OperationsClass 11

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