Question

why is the factorial of zero equals to 1

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Answer 1

Answer:

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:

Because according to rule any number raised to the power of 0 to 1

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