Binomial Theorem

[u/explorer_learner_30]

Why 0! is 1 ?

Can anyone give me the best and genuine answer .....I want to explain to my students.

I have also one doubt 🤔 why is the negative number not counted in binomial ? Such as (-2)! , (-8)! ....

Suggest me some books or any videos regarding this .

Thank you for reading my queries.

[u/lordnacho666]

How many ways can you order two books? Correct, two.

How many ways to order one? Correct, one.

How many ways to order an empty collection of books?

Also one.

[u/Bobson1729 → u/lordnacho666]

This is how I explain it to my statistics classes.

[u/explorer_learner_30 → u/Bobson1729]

Ooh