Sleight_of_Hand
Member
- Joined
- Mar 22, 2009
- Messages
- 192
- Gender
- Male
- HSC
- 2010
How many ways are there to place nine different rings on the
four fingers of your right hand (excluding the thumb) if:
(i) the order of the rings on a finger does not matter?
(ii) the order of the rings on a finger is considered?
I got the first part, but fail to understand the 2nd. Explain please
ps. I realised something:
I forgot to mension. The question is worded badly. It means that you have to use ALL nine rings on the hand. i.e. the first part is 4^9. I didnt realise this till i looked at the answer, but the answersdoesnt say why the 2nd part is as it is.
four fingers of your right hand (excluding the thumb) if:
(i) the order of the rings on a finger does not matter?
(ii) the order of the rings on a finger is considered?
I got the first part, but fail to understand the 2nd. Explain please
ps. I realised something:
I forgot to mension. The question is worded badly. It means that you have to use ALL nine rings on the hand. i.e. the first part is 4^9. I didnt realise this till i looked at the answer, but the answersdoesnt say why the 2nd part is as it is.