Question

Why zero factorial equals one?​

Answer 1

Answer:A zero factorial is a mathematical expression for the number of ways to arrange a data set with no values in it, which equals one. In general, the factorial of a number is a short hand way to write a multiplication expression wherein the number is multiplied by each number less than it but greater than zero.

Step-by-step explanation:

Answer 2

Answer:

0 factorial is permutation and combination in that field of maths. it denotes the number of ways in which 20 things can be arranged in 0 places, which equal 1 show 0 factorial is equal to 1.