#1

#2**0 **

n choose 1 is always n. Similarly, n choose n and n choose 0 are always 1.

\({n}\choose{1}\) = n. \({n}\choose{n}\) = \({n}\choose{0}\) = 1.

- PM

PartialMathematician
Dec 15, 2018

#3**0 **

You can learn the binomial theorem and memorized pascal's triangle to help yourself.

- PM

PartialMathematician
Dec 15, 2018

#4**0 **

That's just \(n\) !

Imagine you have 10 cakes in front of you and you choose one. How many possibilities are there? 10 possibilities, of course! (Unless you are like me and you love cake so you sneak another one ) This is for any number, not just 10, of course.

You are very welcome!

:P

CoolStuffYT Dec 16, 2018