Perms and Combs Q (2 Viewers)

[burningbelcher]

In how many ways can you place 6 different rings on 4 fingers of a hand (excluding the thumb) if:

a) Some fingers can be empty?
b) None of the fingers can be empty?

Can this be solved using stars and bars?

 

[5uckerberg]

If some fingers can be empty I think that it can be cheesed with ways because you can technically put 6 rings on any of the 4 fingers of your choice.

For the non of the fingers can be empty then we have a case of .

 

[burningbelcher]

If some fingers can be empty I think that it can be cheesed with ways because you can technically put 6 rings on any of the 4 fingers of your choice.

For the non of the fingers can be empty then we have a case of .

I was thinking that... but that would mean that they are all the same rings. It says that the rings are all different, so would you times it by 6fact?

 

[liamkk112]

this question kinda sucks coz what about if u can put all of the rings on one finger lol