Choose the correct option for the following.
$n! = n (n - 1) (n - 2) . . . . .3 .2 .1$

True

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False

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Ambiguous

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Data insufficient

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Solution

The correct option is A True
Factorial : the product of an integer and all integer less than that
$∴ n! = n \times (n - 1) \times (n - 2) . . . . . . . . . . . .3 \times 2 \times 1$

$∴$ The given statement
$n! = n \times (n - 1) \times (n - 2) . . . . . . . . . . . .3 \times 2 \times 1$ is True

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