Question

Why factorial of 0 is 1?​

Answer 1

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This still counts as a way of arranging it, so by definition, a zero factorial is equal to one, just as 1! is equal to one because there is only a single possible arrangement of this data set.

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Answer 2

Step-by-step explanation:

A zero factorial is equal to 1 because there is only a single possible arrangement of this data set...

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