Why 0! is 1. explain.

1.	Why 0! is 1. explain.
Answer» Answer: 0 factorial is used MAINLY in permutation and combination. In that field of maths, it DENOTES the number of WAYS in which 0 things can be arranged in 0 places, which equals one (the only way is not ARRANGING anything, that's the one way). So, 0 factorial is equal to 1.

Answer»

Answer:

0 factorial is used MAINLY in permutation and combination. In that field of maths, it DENOTES the number of WAYS in which 0 things can be arranged in 0 places, which equals one (the only way is not ARRANGING anything, that's the one way). So, 0 factorial is equal to 1.

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Why 0! is 1. explain.​

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Why 0! is 1. explain.