Question

give me reason why n combinantion 0 is 1 inpractical life?

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. 4! = 24, for example, is the same as writing 4 x 3 x 2 x 1 = 24, wherein one uses an exclamation mark to the right of the factorial number (four) to express the same equation.